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Home CacheSleuth's main landing page, search bar, quick-action cards for the Multi Decoder, Wherigo Solver, Codes & Symbols, and Geocache Viewer, plus an inline coordinate converter, the geocaching quick search, and a rotating featured-tools panel. Open

Geocaching Quick Links Open the homepage with the sidebar switched into geocaching mode, direct links to your dashboard, hides, trackables, lists, friends, and other shortcuts on geocaching.com. Open

Geocaching Lingo Look up geocaching words, phrases, abbreviations, and acronyms. Open

Games Browse game caches and interactive puzzle pages created by CacheSleuth. Open

Contact Send questions, comments, or suggestions to CacheSleuth. Open

Privacy How CacheSleuth handles your data, translation, tool input, cookies, localStorage, and third-party services. Open

What's New A tour of the redesign and the new tools, dark mode, mobile-first layout, smarter search, translation support, and per-tool quality-of-life upgrades. Open

Report Translation Issues Submit corrections for incorrect or awkward machine translations on CacheSleuth. Open

Multi Decoder Paste cipher text and run 250+ decoders at once, Caesar, Vigenère, Atbash, Bacon, Polybius, Beaufort, Playfair, ADFGX, Morse, Base64, and dozens more, with optional keyword, alphabet, and number hints. Detects coordinates in multiple notations, surfaces possible plaintext words, and groups results by likelihood so the right answer rises to the top. Open

Multi Encoder Type a message, supply optional keys / pad / numbers, and the Multi Encoder produces every reversible cipher and variant we can generate (Caesar, Bacon in every style, Morse, Atbash, Vigenère, Base64, and more), each with a round-trip check so you know exactly what got encoded. Open

Cipher Identifier Automatic cipher identifier. Paste an unknown ciphertext and we analyze its charset, frequency, index of coincidence, bigrams, and repeat patterns to recommend the most likely cipher with deep-link buttons into the matching solver. Open

Code Image Decoder Upload a picture of a coded message written in a symbol alphabet and read it back to letters. The decoder finds each glyph, matches it against the chosen code's reference symbols, and checks the result against a dictionary and coordinate patterns. Works best on clean, evenly spaced, high-contrast images. Open

Geocache Viewer View Geocaching.com pages in a clean, organized layout that surfaces details normally hidden, like coordinates in every notation, encrypted hints, log history, attributes, waypoints, images, and embedded HTML. Everything stays in your browser. Open

Wherigo Solver Drop a .gwc Wherigo cartridge and the solver decompiles it, scans the Lua source, zone data, and in-game messages, and surfaces the most likely final geocache coordinates with a confidence rating. Browse zones, media, messages, and decompiled Lua, plus built-in solvers for Reverse Wherigo cartridges (Waldmeister, day1976, ReWind, and Maxipimpf Reverse Cache Box formats) and Trekkie79's Multi Location Maze code. Open

Reader View Paste a web page link and Reader View pulls out the article, drops the ads, pop-ups, navigation, and sidebars, and lays it out as clean, adjustable text with light or dark mode. Read it aloud with the built-in text to speech, tune the font and width, and grab a one-click bookmarklet to send whatever page you are on straight to the reader. When a page is paywalled it can fall back to an archived copy. Open

Warp File Transfer Send files privately with Warp, CacheSleuth's end-to-end encrypted file transfer. Files are encrypted in your browser, links expire and can self-destruct. Open

Coordinate Converter Convert geocoordinates between Decimal Degrees, DDM, DMS, UTM, MGRS, Plus Codes, Geohash, Maidenhead, Reverse Wherigo, and many more, with map links and elevation lookup. Open

Coordinate Checksum Calculate the geocaching coordinate checksum, the sum of every digit in a Degree Decimal Minutes coordinate. Check one or many coordinates at once and verify them against an expected checksum. Open

Multi-Cache Worksheet A worksheet for solving multi-caches and mysteries. Chain stages together with known coordinates, formulas, projections, offsets, midpoints, and clue values, verify each step against its published checksum, and map the whole route. Open

Wherigo Player Load a .gwc Wherigo cartridge and play it right in your browser: zones drawn on a live map, a movable GPS marker that re-evaluates every zone as you go, dialogs, inputs, inventory, tasks, media, and the completion code at the end. Nothing leaves your device. A debug drawer shows live variables, zone states, and distances for puzzle solvers. Open

Reverse Wherigo (Waldmeister) Calculate coordinates from Waldmeister Reverse Wherigo codes, or create codes from cache coordinates. Open

Reverse Wherigo (day1976) Calculate coordinates from day1976 Reverse Wherigo codes, or create codes from cache coordinates. Open

Reverse Wherigo (ReWind) Calculate coordinates from a ReWind Reverse Wherigo unlock code, or create a code from cache coordinates. Open

Reverse Cache Box (Maxipimpf) Calculate coordinates from the three Maxipimpf Reverse Cache Box codes, or create codes from cache coordinates. Open

Geoart Builder Create geocache geoart from posted and final coordinates, validate distance rules, choose cache-type icons, and export GPX or CSV files. Open

Incomplete Coords Find possible geocache coordinates when one to three digits are missing from a DDM coordinate. Open

Batch Convert Coords Batch convert GPS coordinates between DDM, DD, DMS, UTM, MGRS, Plus Code, Reverse Wherigo, OSGB, GeoHex, Geo3x3, Maidenhead, NAC, Geohash, Mercator, and antipode. Open

Map Coordinates List Map a list of GPS coordinates and calculate segment and total distances between points. Open

Distance & Midpoint Calculate the distance, bearing, and midpoint between two GPS coordinates in common geocaching coordinate formats. Open

Projection Project a waypoint from a GPS coordinate using a bearing and distance, then view the projected point and midpoint. Open

2 Circles Intersect Calculate the intersection points of two circles from center coordinates and radii (two-point trilateration), with a least squares best fit when the circles do not quite touch. Open

2 Lines Intersect Find where two bearing lines intersect using two known coordinate points and a bearing from each. Open

3 Circles Intersect Trilateration on the map, calculate the intersection point of three circles from center coordinates and radii, with a least squares best fit for distances that do not quite agree. Open

4 Points Intersect Find where two geodesic lines intersect. Lines are drawn from A to B and C to D. Open

Antipode Finder Find the antipode (the point diametrically opposite through the center of the Earth) for any GPS coordinate, with side-by-side maps of your point and its antipode. Open

Center of Triangle Calculate the center, area, and perimeter of a triangle defined by three GPS coordinates. Open

Centroid of Points Calculate the geographic centroid (center point) of an arbitrary list of coordinates using a 3D cartesian average. Open

Circle 3 Points Calculate the center point and radius of a circle passing through three GPS coordinates. Open

Coordinate Averaging Average multiple GPS coordinate readings of the same location into a single best-estimate coordinate, with the spread of the readings. Open

Distance to Horizon Calculate the distance to the horizon for an observer at a given height, accounting for Earth's curvature and optional atmospheric refraction, plus the line-of-sight range to a raised object. Open

Ellipsoid Transform Convert a coordinate from one geodetic datum to another using a 7-parameter Helmert transformation, then view the shifted point on the map. Open

Line Circle Intersect Calculate where a line defined by two GPS points intersects a circle defined by a center point and radius. Open

Orthogonal Projection Given a line through two points and a third point off the line, find the foot of the perpendicular (the nearest point on the line), plus the cross-track and along-track distances. Open

Point Bearing to Line Calculate the intersection of a bearing projected from one coordinate point with a line segment defined by two other coordinate points. Open

Polygon Area Calculate the geodesic area, perimeter, and centroid (center of gravity) of a polygon or quadrilateral defined by a list of coordinates. Open

Resection Work out your location by measuring the compass bearing to three known coordinate points, then crossing the back-bearings to fix your position. Open

Rhumb Line Calculate the rhumb line (constant compass bearing) course and distance between two coordinates, compared with the great-circle path. Open

Segment a Line Divide the line between two coordinates into a number of equal segments and list every intermediate point along the way. Open

Triangulation Find an unknown point using two known coordinate points and a bearing from each. Open

Formula Solver Solve geocaching formulas with letter variables. Put math in square brackets, give each variable a value or a range, and get every result at once. Supports cross sums, word values, trig, roots, factorials, constants, exact modular and bitwise math, and references between formulas. Open

Variable Coordinate Calculate geocache coordinates from a formula with A-Z variables and bracketed math. Variables can be fixed values, ranges, or sets that expand to every combination, with each result parsed and mapped. Open

Wherigo Maze (Trekkie79) Calculate coordinates from the Multi Location Maze 11-character code, or create a code from cache coordinates. Open

Cache Placement Helper Enter coordinates or use your current location to drop a draggable pin on the map. Click the map to reposition the pin. Open

Geohashing Compute the Munroe (xkcd) geohash coordinate from a date, your graticule, and that day's Dow Jones opening, with the worldwide globalhash and an interactive map. Open

Browse all codes Browse 300+ geocaching code tables in one place, including Pigpen, Braille, flags, fictional alphabets, symbols, and more. Open

View Code Builder Code image tool to display over 300 code tables, especially useful for geocache puzzle solving. Open

View Examples View every supported geocaching code table example in one place using custom text. Open

Code Identifier Snap a photo or upload an image of a single glyph from an unknown symbolic alphabet (Pigpen, Dancing Men, Aurebesh, Klingon, Daedric, dozens of constructed-language scripts and historical ciphers) and the identifier compares it against thousands of reference glyphs to suggest which code it most likely belongs to. Pairs naturally with the Code Tables to confirm and decode. Open

Code Image Decoder Upload a picture of a coded message written in a symbol alphabet and read it back to letters. The decoder finds each glyph, matches it against the chosen code's reference symbols, and checks the result against a dictionary and coordinate patterns. Works best on clean, evenly spaced, high-contrast images. Open

Additive Add a numeric key to each letter's position to shift it, a classical generalization of Caesar where the shift can vary per character. Custom alphabets supported. Open

ADFGX German WWI field cipher (1918) combining a 5×5 Polybius square (using only ADFGX as coordinates, easy to send by Morse) with a keyword-based columnar transposition. Open

ADFGVX Successor to ADFGX with a 6×6 square that includes digits 0–9. Used by the German army in 1918 until cracked by French cryptanalyst Georges Painvin. Open

Affine Each letter's position is multiplied by one key, then offset by another, modulo 26, the affine map of monoalphabetic ciphers. Caesar is the special case where the multiplier is 1. Open

Albam Hebrew kabbalistic substitution cipher that splits the alphabet in half and swaps the corresponding letters of the two halves. A close cousin of Atbash. Open

AMSCO AMSCO is an incomplete columnar transposition cipher that fills a keyword-ordered grid by alternating one and two letters per cell, then reads the columns in key order. Open

ASCII-85 ASCII-85 and Base85 encoder and decoder for converting text to and from Adobe-style ASCII85. Open

Atbash Hebrew substitution cipher that reverses the alphabet, A↔Z, B↔Y, C↔X, appearing in the Book of Jeremiah. The simplest reciprocal cipher. Open

Autokey Polyalphabetic Vigenère variant that extends the keyword with the plaintext (or ciphertext) itself, so the running key never repeats. Configurable alphabets and keyword. Includes an automatic solver to crack the keyword from ciphertext. Open

Bacon Francis Bacon's 1605 binary cipher hides a message inside an apparently innocent text using two letterforms (or two typefaces) per letter. Includes Bacon's distinct and merged variants plus puzzle-style key options. Open

Beaufort Reciprocal Vigenère variant where the same operation encrypts and decrypts. Named after Admiral Sir Francis Beaufort, who based it on Giovanni Sestri's earlier work. Includes an automatic solver to crack the keyword from ciphertext. Open

Variant Beaufort Close cousin of Beaufort that reverses the subtraction direction (key minus plaintext). Used on Confederate-era cipher disks during the American Civil War. Includes an automatic solver to crack the keyword from ciphertext. Open

Bifid Felix Delastelle's fractionating cipher: each letter splits into two coordinates on a 5×5 Polybius square, coordinates are interleaved across a period, and read back as new letters. Open

Book Cipher Decode book ciphers and Ottendorf-style references by selecting pages, lines, words, or characters from a pasted source text. Open

Burrows-Wheeler Reversible block-sorting transform that rearranges text into runs of similar letters. Used inside the bzip2 compressor and as a puzzle scrambler that decodes cleanly back. Open

Caesar Box Simple transposition that writes the plaintext into a rectangular grid row by row, then reads it back column by column. Quick to spot when text length is a perfect square. Open

Carbonaro Italian 19th-century swap cipher used by the Carbonari secret society in the lead-up to Italian unification, pairing letters around a central pivot. Open

Chaocipher John F. Byrne's 1918 two-disk cipher in which both alphabets permute themselves after every letter. Byrne offered cash prizes for breaking it; the algorithm wasn't published until 2010. Open

Columnar Transposition Plaintext is written into a grid below a keyword, then read out column by column in the order given by the keyword's letter ranks. Configurable padding and alphabet. Open

Crib Solver Paste ciphertext and a suspected word or coordinate, the crib. The solver infers the cipher family, key, shift, or XOR key, decodes a preview, and ranks candidates by confidence. Open

Cryptogram Solver Auto-solves monoalphabetic substitution ciphers (Aristocrat, Patristocrat, Caesar, Atbash, keyword). Runs entirely in your browser. Lock letters to refine the result. Open

Digraph Number Decoder Decode number puzzles where each value is a letter pair, not arithmetic. Maps numbers to digraphs on a 26 by 26 grid (AA=1 through ZZ=676), with encode mode, a custom alphabet, and 0-based and column-first variants. Useful for geocaching puzzles hinting at Della Porta, digraphs, or letter pairs. Open

Double Transposition Columnar transposition applied twice with two different keywords. Used by Allied and Axis intelligence services through World War II for medium-grade traffic. Open

Enigma Machine Configurable Enigma rotor machine simulator with 13 models, ring settings, start positions, reflectors, plugboard pairs, and foreign-character handling. Open

Foursquare Felix Delastelle's digraph cipher that operates on letter pairs using four 5×5 squares, two filled with a keyed alphabet and two with the standard alphabet. Open

Fractionated Morse Plaintext is converted to Morse, regrouped in threes (with separators), then each three-symbol group is looked up in a keyed alphabet. Used by US forces in World War I. Open

Grandpré Encrypt and decrypt the Grandpré cipher using a configurable letter grid, random homophone choices, and coordinate-pair output. Open

Gronsfeld Vigenère with a numeric key (digits 0–9) instead of a letter keyword, so each plaintext letter shifts by the matching digit. Supports autokey mode and custom alphabets. Includes an automatic solver to crack the numeric key from ciphertext. Open

Hill Lester Hill's 1929 polygraphic cipher: plaintext blocks are multiplied by a 2×2 matrix key modulo 26, the first cipher to operate on more than three letters at a time. Open

Kamasutra One of the earliest substitution ciphers, described in the 4th-century Sanskrit Kama Sutra. The 26 letters are paired so each letter encrypts to its partner and vice versa. Open

Keyboard Cipher Shift each letter to a neighbor on a physical keyboard layout, left, right, up, or down. Supports QWERTY, AZERTY, and QWERTZ layouts. Open

Keyed Caesar Caesar shift built on a keyed alphabet: the keyword's unique letters appear first, then the rest of the alphabet, and the whole thing is rotated. Open

Multiplicative Each plaintext letter's position is multiplied by a key (coprime with 26) modulo 26, a close cousin of Caesar that scrambles instead of just shifting. Open

Morbit Encode plaintext into Morbit cipher digits, or decode Morbit ciphertext back to text, using a 9-letter keyword or 1-9 permutation key. Open

Nihilist Russian Nihilist cipher combining a Polybius square with a numeric keyword. Each plaintext letter and each keyword letter are converted to two-digit Polybius coordinates and added together to produce the ciphertext. Open

Numeric Homophonic Encode and decode numeric homophonic ciphers with an A-Z key where each letter may map to one or more exact number tokens. Open

One Time Pad The only mathematically unbreakable cipher when the key is truly random, as long as the message, and used exactly once. Generate a fresh pad or supply your own. Open

Pizzini Italian Renaissance cipher developed by Pope Innocent X's secretary Matteo Argenti and named after the Pizzini family, where letters map to numbered positions in a keyed grid. Open

Playfair Charles Wheatstone's 1854 digraph cipher worked on letter pairs using a keyed 5×5 grid. Adopted by the British in the Boer War and World War I. Open

Pollux Morse-based cipher in which dots, dashes, and separators are each replaced by one of several substitute characters, masking the underlying Morse pattern. Open

Polybius Square Each letter is encoded as the row/column coordinates of its position in a 5×5 (letters) or 6×6 (letters + digits) grid. Supports keyed alphabets and custom coordinate labels. Open

Porta Key Giovanni Battista della Porta's 1563 reciprocal polyalphabetic cipher. The keyword chooses one of 13 alphabet pairings, and the same operation encrypts and decrypts. Includes an automatic solver to crack the keyword from ciphertext. Open

Ragbaby Ragbaby is a keyed periodic substitution cipher. A keyword builds a 24 letter mixed alphabet, then every letter is shifted forward by a number that counts up across the words of the message. Open

Rail Fence Write the plaintext zig-zagging down and up across a chosen number of rails, then read it off row by row. Configurable rail count and starting offset. Open

RC4 Educational RC4 stream cipher. Enter a key to generate a pseudo-random keystream and XOR it with your text. Output as hex or Base64. Encryption and decryption are the same operation. Open

Rot / Caesar Shift each letter by a chosen amount, with one-click presets for ROT13, ROT5, ROT18, and ROT47 covering letters, digits, and the full printable ASCII range. Open

Rotation Grid Rotate text written into a grid 90° left or right, handy for puzzle text laid out in non-standard reading orders. Configurable column count and padding. Open

Rot Special Caesar-style rotation that lets you choose exactly which characters get shifted and which pass through untouched. Useful for puzzles that mix cipher and plain text. Open

Route Transposition Writes the plaintext into a grid and reads it back along a chosen path (spiral, diagonal, or zig-zag) instead of plain columns. Open

RSA Educational RSA demo using tiny primes and BigInt math. Generate a key pair from two primes, then encrypt and decrypt text or a single number. For learning and puzzles only, not for real security. Open

Running Key Vigenère-style cipher where the key is a long passage of natural text (a book, a poem) rather than a short repeated keyword, defeating standard Kasiski analysis. Open

Scytale Ancient Spartan transposition cipher: text wrapped around a cylinder of a specific diameter, then unwrapped, scrambles into a regular column rotation. Open

Solitaire Solitaire (Pontifex) is a hand cipher designed by Bruce Schneier that uses an ordered deck of 54 cards, including two jokers, to generate a keystream for encrypting and decrypting messages. Open

Straddle Checkerboard Soviet-era fractionating cipher mapping common letters to single digits and rare ones to two-digit codes. Often used as an additive over a one-time pad in VIC-style ciphers. Open

Substitution Map each plaintext letter to a custom target letter using a keyed alphabet, the foundation under almost every monoalphabetic cipher in this list. Open

Trifid Felix Delastelle's three-dimensional extension of Bifid. Each letter gets three coordinates from a 27-character cube, interleaved across a period before being read back. Open

Trithemius Johannes Trithemius's 1508 progressive Caesar, each letter shifting by one more than the previous. The first published polyalphabetic cipher and the direct ancestor of Vigenère. Open

Übchi German WWI double columnar transposition variant. Famously broken by French cryptanalysts in 1914 within weeks of its introduction. Open

Vigenère The classic 1553 polyalphabetic cipher: each plaintext letter is Caesar-shifted by the corresponding letter of a repeating keyword. Considered unbreakable for three centuries. Includes an automatic solver to crack the keyword from ciphertext. Open

Vic Cipher Soviet KGB hand cipher used by spy Reino Häyhänen in the 1950s, combining a straddling checkerboard, two transpositions, and a daily key. The strongest hand cipher ever fielded. Open

Abaddon Geocaching code that maps each letter to a unique three-symbol group. Supports the canonical alphabet, custom carriers, or auto-detected three-character patterns. Open

Anagram Solver Find every word and multi-word phrase that can be made from a set of letters. Multi-word phrase anagrams, single-word anagrams, and a 'words from these letters' subset mode. Toggle between a common-words dictionary and a 235,000-word full dictionary. Solves instantly in your browser, no server round-trips. Open

Backslash Three-character code built from forward slash, pipe, and backslash symbols. Each letter is encoded as a group of three; supports custom carriers and auto-detection. Open

Baudot Murray The 5-bit telegraph codes that preceded ASCII, ITA1 (Baudot) on early teleprinters and ITA2 (Baudot–Murray) on Western Union and TWX networks. Open

Beghilos Convert words to the calculator numbers that spell them upside down, or flip a number to read the hidden word. Uses the classic seven-segment letters from the word BEGHILOS. Open

Brainf*ck & Ook! Convert between text, Brainf*ck, Ook!, and Short Ook! code, with a small interpreter. Open

Chinese Code Geocaching code that represents each letter as a small grid of dashes and pipes, visually similar to Chinese hanzi strokes, hence the name. Open

Clock Code Encodes letters as clock-face hours with AM/PM markers and "00" as a word separator. Often appears in geocaching puzzles using clock imagery. Open

Colored Squares Code Encode text as colored-squares blocks where each square has a binary value (1, 2, 4, 8, 16) summing to a letter A-Z. Recolor every value, toggle numbers, resize blocks, and export a PNG or share link for geocaching puzzles. Open

Cow Convert text to COW code and execute COW programs back into text. Open

Decabit Ten-bit punched-card-style code where each character is a binary string. Output can be ASCII text or the equivalent decimal numbers. Open

DTMF DTMF (Dual-Tone Multi-Frequency) maps each phone-keypad press to a pair of audio frequencies. Only the 16 keypad characters are valid input: digits 0-9, letters A-D, *, and #. Any other character in the plaintext (letters E-Z, spaces, punctuation) is silently dropped. Open

Dvorak ↔ Qwerty Convert text typed on one keyboard layout as if it had been typed on the other (QWERTY ↔ Dvorak). Useful when puzzle text was prepared on the wrong layout. Open

Enclosed Areas Count enclosed areas in uppercase letters, lowercase letters, and numbers with open or closed 4 handling. Open

Five Needle Telegraph Cooke and Wheatstone's 1837 telegraph used five magnetic needles pointing left or right to spell out one of 20 letters across two wires. Open

GoldBug The substitution cipher from Edgar Allan Poe's 1843 short story "The Gold-Bug," where the buried-treasure cryptogram is solved by frequency analysis on the page. Open

Hodor Translates each letter to a unique syllable in the Hodor language from HBO's Game of Thrones, where the character can only say his own name. Open

Kenny Three-character syllabic code based on the muffled speech of Kenny McCormick from South Park, mapping each letter to a sequence of m/f/p sounds. Open

Leet / Visual Substitution Decode 1337 leet and visual lookalike text back to ranked plaintext, or encode words into light, classic, advanced, and page-safe leet styles for geocache puzzles. Open

Letters ↔ Numbers Convert letters to numbers and numbers back to letters using A=1 through Z=26. Open

Morse International Morse code with optional puzzle variants: reverse the sequence, swap dots and dashes, or both. Common transformations in mystery caches. Open

Music Notes Decoder Decode music-note puzzle clues from typed notes or uploaded MIDI, MusicXML, ABC, text, and clean monophonic audio files into letters, numbers, Morse, and coordinates. Open

UnMorse Decode run-on Morse code without separators by branching possible letter groupings and exploring viable translations. Open

Nak Nak Encode text to Nak Nak code and decode Nak syllables back to text. Open

Navajo Code Talkers Encode and decode messages with the World War II Navajo code talkers' alphabet, where each English letter is spoken as a Navajo word whose English meaning starts with that letter. Open

Number Pad Lines Convert letters or keypad line number paths into Number Pad Lines images. Open

PLANET Barcode PLANET (Postal Alpha Numeric Encoding Technique) maps each digit 0-9 to a 5-bar short/tall (i/I) pattern, framed by tall bars. Auto-detects two non-standard symbols (e.g. ./|, a/b, x/o) and tries both orientations. Open

POSTNET Barcode POSTNET (Postal Numeric Encoding Technique) maps each digit 0-9 to a 5-bar short/tall (i/I) pattern, framed by tall bars. Auto-detects two non-standard symbols (e.g. ./|, a/b, x/o) and tries both orientations. Open

Punycode Encode and decode internationalized domain names with RFC 3492 Punycode. Unicode labels become ASCII with an xn-- prefix, and back again. Open

Quadoo A nine-segment digital display alphabet, think calculator-style segments extended to cover the full alphabet. Includes matching symbol images for each character. Open

Qwerty Coordinates Convert Qwerty keyboard characters to row and column coordinate pairs. Open

Qwerty Shifter Shift letters, numbers, and optional special characters across Qwerty keyboard rows. Open

Seven-Segment Display Encode and decode strings written in segment-display notation. Each character is described by the set of segment labels (A, B, C, …) that are lit. Supports 7-, 9-, 14-, and 16-segment displays. Open

Slash and Pipe Code in which each letter is encoded as a group of slashes and pipes ( / and | ). A common building block in geocaching cipher puzzles. Open

Spam Mimic Text steganography that disguises a secret message as spam-style prose, a fake PGP armor block, or a run of spaces and tabs. Optional password layer. Encode and decode entirely in your browser. Open

Spelling Alphabet Convert text to and from spelling-alphabet code words. Includes the NATO/ICAO alphabet (Alfa, Bravo, Charlie), police (Adam, Boy, Charles), Western Union, RAF, Able Baker, and Dutch, German, Swedish, and Russian variants. Open

Spirit DVD Decode or encode the Spirit Mars rover DVD code, a variable-length line and dash alphabet used on The Planetary Society DVD carried by Spirit. Open

Tap / Knock Convert Tap Code between letters, numeric row-column pairs, and dot groups. Open

TAPIR Substitution Encode and decode the TAPIR substitution table used by the DDR MfS and NVA, including the numeric mode used for digits and punctuation. Open

Tomtom Drum-language code that uses forward slashes and backslashes to represent letters as drumbeat patterns, adapted from African talking-drum traditions. Open

T9 Decoder Find dictionary words from T9 predictive text digit sequences. Open

Upside-Down Text Flip text upside down using Unicode characters that resemble rotated letters, numbers, and punctuation. Flip a message, then unflip it to read the original. Open

Vanity Old-style mobile phone keypad text input: 2=A, 22=B, 222=C, 3=D, etc. Decodes from repeated key presses, key/position pairs, or directional sequences. Open

Vector Path Decoder Render Logo-style vector path commands such as FD, BK, LT, RT, PU, and PD as an inspectable SVG drawing for geocaching puzzles, with text encoding, rotation, flips, export, and share links. Open

X&Y Code Art Encode letters, numbers, and punctuation as ITA2/Baudot-style five-bit color blocks in an X&Y-inspired visual code, with PNG/SVG export and share links for geocaching puzzles. Open

Zalgo Text Turn plain text into glitchy Zalgo text by stacking Unicode combining diacritical marks, with an intensity control. Clean Zalgo text back to readable characters. Open

Amicable Numbers Two different numbers are amicable when each one equals the sum of the other's proper divisors, like 220 and 284. Check any number to find its amicable partner if it has one, or list every amicable pair up to a limit for puzzle use. Open

Armstrong Numbers An Armstrong (or narcissistic) number equals the sum of each of its digits raised to the power of the digit count, like 153 = 1^3 + 5^3 + 3^3. Check any number to see its full digit-power breakdown and verdict, or list every Armstrong number up to a limit for puzzle use. Open

ASCII / Unicode / Hex Codes Convert text and characters between ASCII/Unicode, decimal, hexadecimal, octal, binary, Unicode notation (U+0041), and HTML numeric entities (A and A). Type into any field and the others update live. Open

Automorphic Numbers An automorphic number is one whose square ends in the number itself, like 76 because 76 squared is 5776. Check any number to see its square with the matching tail highlighted and the verdict, or list every automorphic number up to a limit for puzzle use. Open

Babylonian Numbers Encode and decode Babylonian numerals, the sexagesimal (base 60) system of stacked tens and units wedges. Enter a number to see its cuneiform glyphs and place values, or read a numeral back to decimal. Open

BCD Code Encode positive whole decimal numbers as Binary-Coded Decimal nibbles, or decode BCD bit groups back to decimal digits for geocaching and logic puzzles. Open

Barcode Numbers Barcode number pattern converter for digits 0 through 9. Open

Base Conversion Convert integers between bases 2 through 62. Open

Base100 Encode and decode Base100 emoji streams. Each UTF-8 byte maps to one emoji codepoint in the canonical U+1F3F7 to U+1F4F6 range. Open

Base32 Encode and decode text using the standard RFC 4648 Base32 alphabet (A–Z, 2–7). Often seen in TOTP secrets, QR codes, and DNS-safe identifiers. Open

Base58 Encode and decode text using Base58. Choose between the Bitcoin alphabet (123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz) and the Flickr alphabet (lowercase before uppercase). Base58 omits visually ambiguous characters like 0, O, I, and l. Open

Base62 Encode and decode text using Base62. Supports both 0-9A-Za-z and 0-9a-zA-Z alphabet orderings. Open

Base64 Base64 encoder and decoder for text. Open

Big Number Calculator A large integer calculator for decimal, hexadecimal, octal, and binary values with standard arithmetic, modular arithmetic, bitwise operations, powers, and modular inverse. Open

Catalan Numbers Catalan numbers count many things: valid bracket sequences, binary trees, polygon triangulations, and more. List the first terms, look up C(n) for any index, or test whether a number is a Catalan number and see its index. Computed with arbitrary precision. Open

Collatz (3n+1) The Collatz conjecture, also called the 3n+1 problem, repeatedly halves even numbers and turns odd numbers into 3n+1 until reaching 1. Trace the full hailstone sequence for any starting number, see its step count and peak value, or search for the starter with the longest sequence up to a limit. Open

Factorions Replace a number with the sum of the factorials of its digits, then repeat. The chain either lands on a fixed point called a factorion, falls into a number that is itself a factorion, or settles into a repeating cycle. In base 10 there are exactly four factorions: 1, 2, 145, and 40585. Trace the chain for any number and see its outcome. Open

Figurate Numbers Figurate numbers count dots arranged into regular shapes. Pick a type (triangular, square, pentagonal, hexagonal, or tetrahedral), list the first terms, look up the value at a given index, or test whether a number belongs to that family and see its index. Open

Harshad Numbers A Harshad (or Niven) number is one that is divisible by the sum of its own digits, like 18 which has digit sum 9 and 18 divided by 9 is 2. Check any number to see its digit sum, quotient, and verdict, or list every Harshad number up to a limit for puzzle use. Open

Kaprekar (6174) Kaprekar's routine sorts a number's digits high to low and low to high, then subtracts, and repeats until it locks onto 6174 for four digits or 495 for three digits. Trace the chain and step count for any number, and separately check or list Kaprekar numbers, whose squares split into two parts that add back to the number. Open

Look-and-Say Sequence The look-and-say sequence (Conway's sequence) builds each term by reading the digits of the term before it: 1, 11, 21, 1211, 111221, and so on. Generate terms from any seed, step forward to the next term or backward to the previous one, and look up which term a given number is. Open

Lychrel (196) The reverse-and-add process flips a number's digits and adds it to itself, repeating until the result reads the same forwards and backwards. Most numbers reach a palindrome quickly, but some, like 196, resist for thousands of steps and are called Lychrel candidates. Trace the chain, palindrome, and iteration count for any number. Open

Mersenne Numbers A Mersenne number is M(n) = 2 to the n, minus 1. List M(n) for a range of exponents and see which are Mersenne primes, look up M(n) for any exponent, or test whether a number is one less than a power of two and report its exponent. Computed with arbitrary precision. Open

Number Cruncher A standalone integer number cruncher for geocaching puzzles: inspect parity, primality, factors, special number forms, base conversions, and evaluate BigInt worksheet expressions with variables and modular arithmetic helpers. Open

Cistercian Numbers Encode and decode Cistercian numerals, the medieval monastic system that packs any number from 0 to 9999 into a single glyph built around one vertical stem. Enter a number to draw its glyph, or read the four positional digits back to decimal. Open

Clock Angle Calculate the angle between the hour and minute hands for any time, or find every time that matches a given angle. Open

Cryptarithm Solver Solve cryptarithm and alphametic puzzles by assigning unique digits to letters in arithmetic equations and optional logical conditions. Open

Date Calculation Add or subtract days, weeks, months, and years from a date with leap-year aware Gregorian calendar math for puzzle deadlines, cache anniversaries, and date clues. Open

Date Difference Calculate the exact number of days between two Gregorian calendar dates, with signed direction, absolute distance, inclusive span, and week/day breakdown. Open

Day of the Week Calculate the day of the week for a date, plus its day number within the year and leap-year status, using proleptic Gregorian calendar rules. Open

Digital Root Digital root calculator using several letter value systems. Open

D'Ni Numbers Convert decimal numbers to and from the D'ni base-25 number system from Cyan's Myst series. Type a number or tap the D'ni keypad to see the symbols rendered in the D'ni font, with a power-of-25 breakdown for geocaching puzzles. Open

Euler-Mascheroni (γ) Euler-Mascheroni constant digit lookup and search helper. Open

Euler Number (e) Euler number digit lookup and search helper. Open

Fibonacci Fibonacci number generator and lookup tool. Open

Fraction Approximator Decimal to fraction approximation helper. Open

GC Number ↔ GC ID Convert between geocache GC codes (e.g. GC2J3WZ) and the underlying numeric cache IDs that geocaching.com uses internally. Open

Golden Ratio (φ) Golden ratio digit lookup and search helper. Open

Gray Code Convert numbers between decimal, standard binary, and reflected binary Gray code. Gray code is an ordering of binary where two successive values differ in only one bit. Open

Happy Numbers A happy number is one that eventually reaches 1 when you repeatedly replace it with the sum of the squares of its digits. Check any number to see its full digit-square chain and verdict, or list every happy number up to a limit for puzzle use. Open

Julian Date Converter Convert calendar date/time values to Julian Day numbers and back, including JPL-style month names, day-of-year input, decimal day/time forms, astronomical years, Modified Julian Date, and Unix time. Open

Lucas Numbers Lucas number generator and lookup tool. Open

Maya Numbers Encode and decode Maya numerals, the base-20 system of dots, bars, and a shell for zero. Enter a number to see its stacked glyphs and place values, or read a numeral back to decimal. Open

Nth Day of the Year Calculate today's day number, convert a full date or month/day pair to an nth day of the year, and convert a day number back to a calendar date. Open

Numbers in Alphabetical Order Four conversions in one tool: alphabetical index → number word, number word → alphabetical index, number → English spelling, and spelled-out English → integer. The alphabetical order uses the standard 0–100 ranking where eight = 1, eighteen = 2, eighty = 3, and zero = 101. Open

Numbers To Words Convert numbers to written English words, or parse spelled-out numbers back to digits. Open

Numerology Reduce each letter of a word or phrase to a digit using the Pythagorean (1–9 cycle), Pythagorean (1–0 cycle), or Chaldean systems, then sum and reduce to a single-digit numerology value or digital root. Open

Perfect Numbers A perfect number equals the sum of its proper divisors, like 28 = 1 + 2 + 4 + 7 + 14. When that sum is larger the number is abundant, and when it is smaller the number is deficient. Check any number to see its proper divisors, their sum, and the classification, or list every perfect number up to a limit. Open

Pi (π) Pi digit lookup and search helper. Open

Prime Numbers Prime number list and factorization helper. Open

Pronic (Oblong) Numbers A pronic number, also called an oblong number, is the product of two consecutive integers: P(n) = n(n+1). List the first terms, look up P(n) for any index, or test whether a number is pronic and report its index. Computed with arbitrary precision. Open

Pythagoras's Constant (√2) Square root of 2 digit lookup and search helper. Open

Roman Numerals Roman numeral converter for values 1 through 3999. Open

Sequence Guesser Paste a sequence of numbers, letters, dates, or elements and the Sequence Guesser recognizes the likely pattern, fills in the next or missing terms, and links to the right CacheSleuth tool to finish the job. Open

Shadoks Numbers Shadoks number converter using GA BU ZO MEU. Open

Temperature Converter Temperature conversion calculator. Open

Theodorus' Constant (√3) Square root of 3 digit lookup and search helper. Open

Time Decimal Convert clock times to total seconds since midnight and the percentage of the day elapsed. Useful for puzzles that encode coordinates as times. Open

Triangle Calculator Triangle side angle area and perimeter calculator from three known attributes. Open

UTF-8 Tool UTF-8 text to hex encoder and decoder. Open

Word Values Word and letter value calculator with A1Z26, phone keypad vanity, Scrabble (Dutch, English, German), cyclic tables, and diacritic-extended alphabets, plus diacritic normalization. Open

Image Tools Convert images between JPG, PNG, WebP, and AVIF, compress them without a quality hit, resize batches, and crop to any aspect ratio, all in your browser. HEIC from iPhone photos welcome. Files never leave your device, and converting strips EXIF and location metadata. Open

PDF Toolbox Merge and combine PDFs, split or extract pages, reorder, rotate, and delete pages, turn images into a PDF, export PDF pages to JPG or PNG, and compress a PDF, all in your browser. Files never leave your device, so nothing is uploaded. Open

QR Code Generator Create a custom QR code with a center logo (your image or a default mark), styled dots, configurable size, quality level, and colors. Download as PNG or SVG. Open

QR Code Scanner Upload a QR code image file and scan the encoded text. Open

Exif Reader Upload an image file to read EXIF data. Supports JPEG, PNG, WebP, TIFF, HEIC/HEIF, AVIF and limited GIF support. Open

Reader View Paste a web page link and Reader View pulls out the article, drops the ads, pop-ups, navigation, and sidebars, and lays it out as clean, adjustable text with light or dark mode. Read it aloud with the built-in text to speech, tune the font and width, and grab a one-click bookmarklet to send whatever page you are on straight to the reader. When a page is paywalled it can fall back to an archived copy. Open

Warp File Transfer Send files privately with Warp, CacheSleuth's end-to-end encrypted file transfer. Files are encrypted in your browser, links expire and can self-destruct. Open

Short Links Short Links on CacheSleuth. External

My Short Links Your short-link dashboard. Sign in with your CacheSleuth account (the same one behind My Puzzle Texts and My Caches) to see every go.cachesleuth.com link you have created, copy it, watch its clicks over the last 30 days, change when it expires, edit where it points, regenerate its manage link, or delete it. No separate short-link login. Open

Puzzle Notes Roomy editor for My Puzzle Texts: keep ciphertexts, keys, coordinates, custom alphabets, and scratch notes in one place. Saved in your browser, optionally end-to-end encrypted and synced across devices, with the same notes available in the drawer on every tool page. Open

Hash Functions Generate MD5, SHA-1, SHA-256, SHA-384, SHA-512, SHA-512/224, and SHA-512/256 hashes for text. Open

ISBN Tool Convert ISBN-10 to ISBN-13 or ISBN-13 to ISBN-10, and look up ISBN details through Open Library with Amazon and Google fallback searches. Open

Text Manipulator Manipulate text for puzzle solving with case changes, filtering, reversing, grouping, ROT transforms, replacement, file loading, saving, and content analysis. Open

Unit Converter Expanded unit conversion calculator with lookup-table style results across many measurement categories. Open

Animated Morse Decoder Upload an animated GIF of a blinking light or flashing signal and decode it into Morse code, then plain text. Brightness per frame is measured and timed automatically, with sliders to fine tune the on or off threshold and the dot or dash split. Open

Audio Morse Decoder Upload a recording of Morse code beeps or listen live through your microphone and decode it into Morse and plain text. The dominant tone frequency and the timing are detected automatically, with sliders to fine tune the frequency, threshold, and dot or dash split. Open

Barcode Generator Create barcodes in Code 128, Code 39, and EAN-13 formats with configurable size and colors. Open

Binary to Image Render binary into a picture: 1 bit per pixel black and white, or one byte per pixel grayscale. You can also upload an image and read its pixels back out as a row-major 0/1 bitstream with byte views. Open

Code Image Decoder Upload a picture of a coded message written in a symbol alphabet and read it back to letters. The decoder finds each glyph, matches it against the chosen code's reference symbols, and checks the result against a dictionary and coordinate patterns. Works best on clean, evenly spaced, high-contrast images. Open

File Carver Upload a file and this tool scans every byte for known file-type signatures hidden inside it, including extra data appended after the end of an image. Carve out each find and download it as its own file. Open

GIF Frame Splitter Upload an animated GIF, WebP, APNG, or AVIF and split it into individual frames. View every frame side by side, inspect timing and dimensions, and download frames individually or as a ZIP. Open

Hex Viewer View any file as a hex dump with offsets, raw bytes, and an ASCII column. Extract printable strings from the whole file to surface hidden coordinates or clues. Open

Image Color Tools Non-destructive image color and pixel tools that reveal faint or hidden marks. Tweak brightness, contrast, saturation, hue, invert, threshold, isolate a channel, view a single bit plane, and flip, rotate, or stretch the picture. Open

Image Steganography (LSB) Hide text inside an image by tweaking the least-significant bits of its pixels, then download a lossless PNG. Reveal hidden messages from a stego image, with an automatic header read plus a raw LSB extraction mode for foreign puzzles. Open

Magic Eye Solver Upload a Magic Eye style autostereogram and reveal the hidden depth shape without crossing your eyes. Auto-detects the repeat period, then maps the match between the image and a shifted copy of itself into a visible figure. Open

Magic Eye Text Generator Create a wall-eyed text autostereogram (ASCII magic eye). Type a hidden message, pick random characters or real words for the background, and generate a block of monospace text whose secret words pop out at a different depth when you relax your eyes. Export as plain text or as a fixed-width monospace PNG. Open

Tupper's Formula Encode and decode Tupper's self-referential formula. Convert text, drawings, or images into the integer k for geocaching puzzle caches, and decode k back into a bitmap. Open

Visual Cryptography Split a black-and-white secret image into two share images using a 2-out-of-2 visual secret sharing scheme. Each share looks like random noise on its own, but overlaying the two reveals the hidden picture. Open

Multi Decoder (Classic) Paste cipher text and run 270+ decoders at once, Caesar, Vigenère, Atbash, Bacon, Polybius, Beaufort, Playfair, ADFGX, Morse, Base64, and dozens more, with optional keyword, alphabet, and number hints. Detects coordinates in multiple notations, surfaces possible plaintext words, and groups results by likelihood so the right answer rises to the top. Open

Frequency Analysis Analyze character frequencies, word counts, letter counts, number counts, and symbol counts in a body of text. Open

Decision Tree An interactive flowchart that walks through clues in puzzle text (letter patterns, character sets, common encodings) and points you toward the most likely solver. Open

HTML Encoder Encode HTML or text into JavaScript document.write output. Open

Deck of Cards Code Store a short text message in the order of a deck of 52 playing cards. There are 52 factorial possible orderings, enough to encode any message up to 46 characters. Encode a message into a card order, or decode a card order back into the hidden message. Great for geocaching puzzles. Open

Symbol Explorer Paste any symbol to identify its Unicode name, codepoint, HTML entity, Alt code, and puzzle-solving hints. Search by name, browse categories, compare confusable characters, and analyze symbol-heavy puzzle text. Open

Unicode Characters Unicode character lookup tool that maps each character in a message to its Unicode code point and name. Open

Cache Page Creation A live geocache page builder. Write HTML with one-click formatting, generate styled boxes, images, button links and tables, see a live preview of how it looks on geocaching.com, then copy the code into your cache description. Open

Code and Coordinate Extractor Paste raw text, HTML, GPX, JSON, or KML and instantly extract all geocache GC codes, trackable TB codes, and coordinates at once. Deduplicated and ready to copy: GC and TB codes as a comma separated list for a geocaching.com bookmark list or a Project-GC virtual GPS, and coordinates (decimal, degree minute, DMS, Plus Code, What3Words, geo: URI, and on their own line UTM, MGRS, Mercator, and both Reverse Wherigo styles) for the Coordinate Converter. Open

Log Sheet Builder Make your own printable geocache log sheets and log rolls sized to fit nano, bison tube, film canister, petling, and custom containers. Add a cache name, GC code, your own logo image, pick columns and line styles, optionally add a finder note for muggles, then save as PDF or PNG. Everything runs in your browser, nothing is uploaded. Open

Bookmarklets Bookmarklets that send highlighted text into the Multi Decoder, Multi Encoder, Cipher Identifier, Cryptogram Solver, Anagram Solver, Frequency Analysis, Unicode tool, and code tables, pull every GC code, TB code, and coordinate off a page into the Code and Coordinate Extractor, scrape every coordinate off a page onto the Map Coordinates List, open any page in Reader View, plus shortcuts for coordinate conversion, GC/TB lookup, CacheSleuth search, text manipulation, geocaching user search, keyword search, and GeoCheck captcha entry. Open

Resistor Color Code Decode resistor color bands into resistance and tolerance values using the standard color code table. Open

Periodic Table Convert element atomic numbers to symbols and names, or convert symbols and names back to atomic numbers. Open

Spelling With Elements Spell words with chemical element symbols and view matching periodic table tiles. Open

DNA Translator Translate text to and from CacheSleuth DNA code triplets using A, C, G, and T. Open

Genetic Code Translator Convert DNA or RNA sequences into amino acid sequences, inspect codons, and look up standard genetic code mappings. Open

Draw A Stickman Decode and create Draw A Stickman Episode 1 custom message URLs. Open

Pig Latin Convert a plain English message into Pig Latin. Open

Gallifreyan Generator Translate text into Circular Gallifreyan and save the generated artwork as an image. Open

CacheSleuth Games Browse game caches and interactive puzzle pages created by CacheSleuth. Open

Binairo Solver Enter the given 0s and 1s of a Binairo puzzle, also called Takuzu or Binary Puzzle, then solve the grid so each row and column holds equal counts of each digit, never three of the same digit in a row, and no two rows or columns alike. Click cells to set them and solve grids from 4 by 4 up to 10 by 10. Open

Bridges Solver Place the islands of a Bridges puzzle, also called Hashiwokakero or Hashi, with their numbers and solve it so the islands are joined by straight bridges that never cross, with at most two bridges between a pair, each island carrying exactly its number of bridges, and the whole network connected. Click cells to set island numbers and solve grids up to 9 by 9. Open

Flip A Coin Flip a coin, guess heads or tails, and track wins, losses, and choices. Open

Futoshiki Solver Enter a Futoshiki puzzle, also called Hutoshiki or More or Less, by typing any given digits and clicking the greater-than and less-than signs between cells, then solve the Latin square so every row and column holds each number once while every inequality stays true. Works for grids from 4 by 4 up to 7 by 7. Open

Greater Than Sudoku Solver Solve Greater Than Sudoku puzzles by entering givens and inequality signs between adjacent cells. Open

Game of Life An interactive Conway's Game of Life playground. Paint cells on a grid, step or play the B3/S23 simulation, and load patterns like the Glider, Blinker, Pulsar, and Gosper glider gun. Open

Heyawake Solver Build a Heyawake puzzle by carving the board into rooms and giving some rooms a black-cell count, then solve it so every numbered room holds exactly that many painted cells, painted cells never touch, the white cells stay connected, and no straight run of white cells crosses more than two rooms. Open

Hitori Solver Type the number grid of a Hitori puzzle and solve it to find which cells to shade so that no number repeats among the unshaded cells of any row or column, no two shaded cells touch edge to edge, and all the unshaded cells stay connected. Works for grids from 4 by 4 up to 8 by 8. Open

Kakuro Solver Build a Kakuro puzzle, also called cross-sums, by marking the block cells and typing each across and down run total, then solve so every white cell holds a digit 1 to 9, each run uses different digits, and each run adds up to its clue. Works for grids up to 8 by 8 with a clickable block and clue editor. Open

KenKen Solver Build a KenKen puzzle, also called Mathdoku or Calcudoku, by drawing its cages and entering each cage target and operation, then solve the Latin square so every row and column holds each number once and every cage hits its arithmetic target. Works for grids from 3 by 3 up to 7 by 7. Open

Light Up Solver Build a Light Up puzzle, also called Akari, by marking the walls and their numbers, then solve it to place bulbs so every white cell is lit, no two bulbs shine on each other, and each numbered wall touches exactly that many bulbs. Click cells to set walls and numbers and solve grids up to 8 by 8. Open

Logical Solver Interactive logic grid solver for zebra and Einstein style puzzles. Set up your categories and items, mark relationships or enter clues, and watch it auto-deduce every forced cell across the grid. Open

Magic Square Solver Enter the known numbers of a magic square and solve the rest so that the whole square uses the distinct numbers 1 to n squared and every row, every column, and both diagonals add up to the same magic constant. Works for squares from 3 by 3 up to 5 by 5, completing the cells you leave blank. Open

Mastermind Solver Enter the guesses you have made and the black and white peg feedback for each, and the solver lists every code still possible and suggests the strongest next guess using a worst case minimizing strategy. Works for any number of positions and colors, with or without repeated colors. Open

Masyu Solver Place the white and black pearls of a Masyu puzzle, also called Pearl, and solve it to draw the single closed loop through the cell centres. The loop runs straight through every white pearl and turns at every black pearl, with the matching turn and straight rules on the neighbouring cells. Works for grids up to 8 by 8. Open

Nonogram Solver Enter the row and column number clues of a nonogram, also called picross or griddler, and solve the hidden picture. The solver fills every cell that logic forces and falls back to a search when a puzzle needs a guess. Open

Number Pyramid Enter a number pyramid, also called a number wall, with some blocks left blank, and the solver fills the rest. Every block equals the sum of the two blocks directly beneath it. Open

Numberlink Solver Type the numbered endpoints of a Numberlink puzzle, also called Arukone or Flow, and solve it to connect each pair with a path. The paths never cross or overlap and together fill every cell of the grid. Works for grids up to 8 by 8 with up to a dozen number pairs. Open

Nurikabe Solver Type the island clues of a Nurikabe puzzle, also called Islands in the Stream, and solve it to shade the black sea. Every numbered cell becomes a white island of exactly that size, islands never touch, the sea is one connected region, and the sea has no 2 by 2 block. Works for grids up to 8 by 8. Open

Roll The Dice Roll one or more six-sided dice with running totals. For chance-driven puzzles or just for fun. Open

Scrabble Scorer Type the word you played and set each tile's premium square and any blanks to get the exact play score. Supports Scrabble English and Words With Friends tile values plus the all-tiles bingo bonus. Open

SET Solver Enter the cards laid out in a game of SET by their number, color, shading, and shape, and the solver finds every valid set, where each of the four features is either all the same or all different across the three cards. Each found set is drawn out so you can spot it on the table. Open

Skyscrapers Solver Enter a Skyscrapers puzzle, the Latin square where edge numbers tell you how many buildings are visible looking down each row and column, then solve it so every row and column holds each height once and every clue is satisfied. Type the clues around the grid, add any given heights, and solve grids from 4 by 4 up to 7 by 7. Open

Slitherlink Solver Type the number clues of a Slitherlink puzzle, also called Loop the Loop or Fences, and solve it to draw the single closed loop along the grid edges so that each numbered cell has exactly that many of its four sides on the loop. Works for grids up to 7 by 7 with a simple clue grid. Open

Sudoku Solver HTML Sudoku solver with hints, allowed values, singles, undo, reset, and serial puzzle loading. Open

Tower of Hanoi Pick the number of disks and the peg labels, then get the full minimum move sequence for the Tower of Hanoi. The list shows every step in order and an animation walks through the solution. Open

Word Search Generate a word search grid from a list of words with optional diagonals and reversed words, or paste a grid and a word list to find where each word hides. Runs entirely in your browser. Open

Wordoku Paste a nine by nine wordoku grid built from nine distinct letters and solve it with a backtracking sudoku engine. The solver also lists the diagonals and rows so you can spot the hidden themed word. Open

All builders Make your own geocache puzzle with CacheSleuth: pick a builder, enter your details and a secret final, and get a sharable play link. Players solve it in their browser and the final coordinates or keyword stay on the server until they earn them. No account needed. Open

My Caches Your Cache Builder dashboard. Sign in with your CacheSleuth account (the same one behind My Puzzle Texts and short links) to list every game you have built, reopen it to edit, and see play stats: visits, wins, and last played. Claim older caches with their edit key. Open

Reverse Cache Builder Create a reverse wherigo style geocache: players walk toward a hidden spot guided only by distance and direction, then answer a question or get the final coordinates when they arrive. Multiple stages, time gating, and a sharable play link, no account needed. Open

Hot or Cold Cache Builder Create a Hot or Cold geocache: players view a satellite map, drop a pin, and get temperature feedback, from freezing to on fire, as they close in on a hidden location. Land inside the radius you set and the page reveals your final coordinates or a keyword. No account needed, share one link. Open

Zeroing In Cache Builder Create a Zeroing In geocache: players view a satellite map and fire guesses, battleship style. Each shot reports only how far it landed from the hidden spot, in ranges like less than 500 m or more than 2 miles, never the exact distance or direction. Land inside the radius you set and the page reveals your final coordinates or a keyword. No account needed, share one link. Open

Connect 4 Cache Builder Create a Connect 4 geocache: players open your link and play Connect 4 against the computer. Getting four in a row before the computer does reveals your final coordinates or a keyword. Pick geocaching cache-type discs or classic two-colour pegs, a difficulty, and who moves first. No account needed, share one link. Open

Map Snap Cache Builder Create a Map Snap geocache: mark a secret spot on a map, capture a zoomed-in photo with a red pen mark, and players study just that snippet to find the real location and enter its coordinates. Land within your fuzzy radius and the page reveals your final coordinates or a keyword. No account needed, share one link. Open

Guess My Word Cache Builder Create your own Guess My Word geocache: players guess words and you tell them whether your secret word comes alphabetically before or after, until they land on it. Solving it reveals your final coordinates or keyword. The answer stays on the server, no account needed. Open

Connections Cache Builder Create your own Connections geocache: players sort 16 words into 4 hidden groups of 4, and solving it reveals your final coordinates or keyword. The groups and the final answer stay on the server, checked guess by guess, no account needed. Open

Mastermind Cache Builder Create your own Mastermind geocache: players crack your secret colour code, four to six pegs long, and solving it reveals your final coordinates or keyword. The code and the final answer stay on the server, scored guess by guess, no account needed. Open

Concentration Cache Builder Create your own Concentration memory geocache: players flip tiles to find every matching pair of geocaching icons, and clearing the board reveals your final coordinates or keyword. Pick the board size, an optional mistakes limit, and an optional time limit (easy, medium or hard). The board layout and the final answer stay on the server, flip by flip, no account needed. Open

KenKen Cache Builder Create your own KenKen (Mathdoku) geocache: players fill an arithmetic Latin-square grid and solving it reveals your final coordinates or keyword. A fresh, unique puzzle is generated on the server for every player and every load, so the answer is never hidden in the page. Players pick the grid size you allow, from 4x4 up to 7x7. No account needed. Open

Greater Than Sudoku Cache Builder Create your own daily Greater Than Sudoku (Comparison Sudoku) geocache: every day players get a fresh 9x9 grid solved only from the greater-than and less-than signs between cells, and solving the day's puzzle reveals your final coordinates or keyword. The puzzle is generated on the server, so the answer is never hidden in the page. No account needed. Open

Picture Sudoku Cache Builder Create your own Picture Sudoku geocache: players fill a 9x9 Sudoku grid played with pictures instead of numbers, and solving it reveals your final coordinates or keyword. A fresh, uniquely solvable puzzle is generated on the server for every player and every load, so the answer is never hidden in the page. Pick the difficulty and a picture set. No account needed. Open

Emoji Charades Cache Builder Create your own Emoji Charades geocache: players decode emoji puzzles into common sayings, and getting enough right reveals your final coordinates or keyword. Pick how many correct guesses win. The sayings and the final answer stay on the server, so nothing is hidden in the page, no account needed. Open

T-Rex Run Cache Builder Create your own T-Rex Run geocache: players jump cacti and duck birds until they reach the score you set, and only a real, server-verified run reveals your final coordinates or keyword. The answer never sits in the page, so it cannot be peeked at. Open

2048 Cache Builder 2048 Cache Builder on CacheSleuth. Open

Wordle Cache Builder Create your own Wordle geocache: a classic daily five-letter word game where the word changes every day and only real words are accepted as guesses. Solve the day's word to reveal your final coordinates or keyword. The word and the final answer stay on the server, scored letter by letter, no account needed. Open

Quordle & Sedecordle Cache Builder Create your own Quordle or Sedecordle geocache: guess four words (Quordle) or sixteen words (Sedecordle) at once, every guess scored against all the boards with green, yellow and gray feedback. The words change every day and only real words are accepted. Solve every board to reveal your final coordinates or keyword. The words and the final answer stay on the server, no account needed. Open

Hangman Cache Builder Create your own hangman geocache: players guess your secret word or phrase one letter at a time before they run out of guesses. Pick from six peril themes, gallows, walk the plank, rocket launch, lost signal, melting snowman and bomb defuse, set the difficulty, and reveal your final coordinates or keyword on a win. The word and the final answer stay on the server, so nothing is hidden in the page, no account needed. Open

FoxiMax Cache Builder Create your own FoxiMax geocache: a growing game of hangman where you guess letters one at a time. A hit reveals that letter across every word in play; a miss adds another hidden word, so there is more to solve. Reveal every letter of every word to find your final coordinates or keyword. The words change every day and only real words are used. The words and the final answer stay on the server, no account needed. Open

Mathler Cache Builder Create your own daily Mathler geocache: pick a difficulty and players get a fresh math puzzle every day, a calculation of digits and the operators plus, minus, times and divide that all equal a target number, with green/yellow/gray feedback on every guess. Solving the day's puzzle reveals your final coordinates or keyword. Miss it and they are locked out until tomorrow's puzzle. The equations and the final answer stay on the server, no account needed. Open

Worldle Cache Builder Create your own Worldle geocache: a daily guess-the-country game where players see a country's silhouette and name it in six tries, with distance, direction and proximity after every guess. Solve the day's country to reveal your final coordinates or keyword. The answer stays on the server, no account needed. Open

Strands Cache Builder Create your own Strands geocache: a daily word-search where every letter in a 6x8 grid belongs to a hidden theme word, plus one spangram that spans the board. Players trace words in any direction; find them all to reveal your final coordinates or keyword. A new grid every day, all checked on the server, no account needed. Open

Invisibles Cache Builder Create your own Invisibles geocache: a daily movie puzzle where players see a film still with the people erased and name the movie, with a dashes hint for the title. Solve the day's movie to reveal your final coordinates or keyword. The answer stays on the server, no account needed. Open

Text Adventure Cache Builder Create your own text adventure geocache: players explore a story room by room, collect and use items, and reach the ending to reveal your final coordinates or keyword. Pick from a library of ready-made adventures, set your reveal, and share one link. The answer stays on the server, no account needed. Open

Going In Circles Builder Going In Circles Builder on CacheSleuth. Open

Reference Lists Reference Lists on CacheSleuth. Open

Transportation Codes Transportation Codes on CacheSleuth. Open

Helpful Links Browse external puzzle, cipher, coordinate, checker, app, podcast, and geocaching reference links, grouped by category. Open

Geocaching Lingo Look up geocaching words, phrases, abbreviations, and acronyms. Open

Geocaching Dashboard Your main geocaching.com landing page with recent activity, friend logs, and account shortcuts. External

Message Center Read and reply to direct messages from cache owners and other geocachers. External

Your Public Profile View your profile the way other geocachers see it — finds, hides, souvenirs, and stats. External

Statistics Personal find stats — totals, types, sizes, the difficulty/terrain matrix, and milestones. External

Project-GC Statistics Advanced Project-GC dashboards — challenges, badges, charts, and deep analytics on your finds. External

Souvenirs Souvenirs you've earned from events, milestones, and special promotions. External

Notifications (PMO) Set up email alerts for new caches matching your filters. Premium membership required. External

Pocket Queries (PMO) Build, schedule, and download GPX queries of caches near a point or matching a filter. Premium membership required. External

User Routes (PMO) Draw map routes and pull caches along the path — handy for road trips. Premium membership required. External

Owner Dashboard Manage caches you own — health checks, recent logs, and maintenance alerts in one place. External

Your Owned Hides List of every cache you've published, with status and recent log activity. External

Your Drafts Saved field notes and unfinished log drafts ready to be posted. External

Recently Viewed The last cache pages you opened on geocaching.com — quick way back to one you were just looking at. External

Your Logs Every log you've written, filterable by type and sortable by date. External

Hide New Cache Start the form to publish a new geocache listing. External

Unpublished Hides Caches you've submitted that are still pending reviewer approval or revision. External

Owned Trackables Trackables (geocoins, travel bugs) registered to you, with their current locations and recent moves. External

Your Inventory Trackables currently in your possession that are waiting to be moved to a cache. External

Trackable Logs Every log you've written on a trackable — discovered, grabbed, retrieved, or dropped. External

Your Collection Trackables you've collected as a personal record. Items in the collection are no longer in play. External

Your Lists Bookmark lists, ignore lists, and watchlists you've created on geocaching.com. External

Your Watchlist Caches you're watching for new logs and updates. External

Your Favorites Caches you've awarded a favorite point to. External

Leaderboard Top finders, hiders, and trackable movers across your friends and globally. External

Your Friends Manage your geocaching friends list — add, remove, or browse mutual finds. External

Find a Player Look up another geocacher by username to view their profile, finds, and hides. External

Cipher & Code Tools

Rumkin Cipher Tools Wide range of online cipher tools. External

dCode.fr Cipher Identifier Automatically identifies the cipher type, recognizing nearly 200 cipher types and encodings. External

Boxentriq Cipher Identifier Automatically identifies the cipher type, recognizing over 25 common cipher types and encodings. External

GeocachingToolBox Variety of tools made specifically for geocachers. External

MultiSolver Attempts to automatically solve a variety of ciphers. External

Geocaching Mystery Toolbox Multiple cipher and code solvers, designed with mobile in mind. External

Cryptii Multiple encoders and decoders you can chain together. External

Deseret Alphabet Translator English to Deseret Alphabet translator with Unicode output. External

dCode.fr Tool List Tons of detailed cipher and code tools. External

CryptoPrograms Online tools to create and solve ciphers. External

Anagram-Solver.net Fast anagram solver. External

QuipQiup Cryptogram solver. External

Whats This Word Crossword solver, dictionary, and word finder. External

Geocachers Compass Puzzle solving resources. External

Wordplays Anagram solver. External

Try It Online Run snippets in many programming languages, including esolangs often used in puzzles. External

Morse Code Translator Morse code translator and solver. External

Magic Eye Solver Upload a Magic Eye image and it reveals the hidden picture. External

Coordinate Tools

Geo Javawa Wide variety of mapping and coordinate tools. External

GPS Visualizer Calculators Coordinate calculators and distance tools. External

GPS Visualizer Map Make a Google map from a GPS file. External

Number Tools

WolframAlpha Intelligent calculator that handles a variety of human language equations. External

Angio Pi Searcher Search through 200 million digits of pi. External

Subidiom Pi Searcher Search through 2 billion digits of pi. External

BigPrimes Everything you ever wanted to know about a number. External

DarkByte Binary, hexadecimal, decimal, and Base64 converter. External

Magma Big online math calculator. External

Zompist Numbers from 1 to 10 in over 5000 languages. External

Coordinate Checkers

GeoCheck.org Geocaching coordinate checker. External

Certitude Geocaching coordinate checker. External

GeoChecker Geocaching coordinate checker. External

Puzzle-Checker Geocaching coordinate checker. External

iPhone & iPad Apps

Groundspeak Geocaching App The official Groundspeak Geocaching app (free). External

Cachly Geocaching app with access to Geocaching.com (paid). External

Wherigo The Wherigo app for iPhone. External

Android Apps

Groundspeak Geocaching App The official Groundspeak Geocaching app (free). External

c:geo Open source geocaching app that links to Geocaching.com (free). External

Geooh Geocaching app with a built-in Wherigo player (free with premium access). External

WhereYouGo The Wherigo app for Android (free). External

Desktop Software

GSAK (Geocaching Swiss Army Knife) Powerful database software to manage geocaches, PQs, and GPS exports. External

OpenSAK Free, open source, cross-platform GSAK alternative for Windows, Mac, and Linux. External

FizzyView View your My Finds file as a filterable D/T grid. External

FizzyCalc Windows tool for coordinate conversion, distance, and projection. External

GIMP Free and open source image editor for Windows, Mac, Linux, and more. External

Podcasts

Geocache Talk Network Variety of podcasts on gadgets, puzzles, challenges, kids, and general geocache talk. External

Inside HQ Podcast Podcast from Geocaching HQ with a peek at the inner workings of Groundspeak. External

PodCacher Long-running site with a geocaching podcast, articles, and videos. External

Geocaching Podcast One of the longest running geocaching podcasts, live every Wednesday night. External

Other Useful Sites

My Geocaching Profile Build a detailed profile of your geocaching accomplishments and share it. External

Cacher Stats Rankings for geocachers with 200 or more finds, by location. External

Lab2GPX Generate a GPX of Adventure Labs for use in apps and GPS devices. External

Wherigo.com Create and upload Wherigo cartridges to play on your phone or GPS. External

Wherigo Kit Easy online Wherigo builder with live map editing. External

Wherigo Emulator Upload a Wherigo cartridge and walk through it online on a map. External

Wherigo WiG Crumbler Break a Wherigo cartridge down into waypoints, text, and LUA code. External

Waymarking Catalog, mark, and visit interesting and useful locations around the world. External

NGS Data Sheets Benchmark and survey mark lookup from the National Geodetic Survey. External

NGS Benchmark Viewer Benchmark viewer by ScaredyCatFilms. External

How To Read Gallifreyan A PDF guide on how to read Circular Gallifreyan. Open

Geocaching Rescue Logs Printable triple rescue cache log. External

Project GC Statistics and tools for geocachers and caches all around the world. External

Project GC Profile Stats Dynamically updating stats for your geocaching profile. External

Project GC Map Compare Compare your finds with others on a map to plan routes together. External

Project GC Challenge Checkers Check whether you qualify for challenge caches around the world. External

Project GC Find Bad Logs Find caches you have accidentally logged more than once. External

Project GC Forgotten FTFs Find first-day finds you may have forgotten to mark as FTF. External

Project GC TB Rescue Map of trackables that need help getting moving again. External

Project GC Custom Filters Build custom attribute filters to use with Map Compare. External

Project GC Discover Trackables Log a large number of trackables all at once. External

Log Them All Log a large number of trackables all at once. External

Google Reverse Image Search Reverse image search through Google. Desktop only. External

Mobile Reverse Image Search Mobile-friendly Google reverse image search by Labnol.org. External

TinEye Reverse Image Search Reverse image search across billions of images, mobile and desktop. External

Bing Reverse Image Search Reverse image search through Microsoft Bing. Desktop only. External

Yandex Reverse Image Search Reverse image search, mobile and desktop friendly. External

Rubik's Cube Solver Online solver for 2x2, 3x3, 4x4, and pyraminx cubes. External

Daily T-Rex Arena Interactive CacheSleuth game cache. External

Let's Play A Game: 0h h1 Edition GC95PGH: Interactive CacheSleuth game cache. External

Let's Play A Game: 2048 Edition GC70Z3X: Interactive CacheSleuth game cache. External

Let's Play A Game: Alien Invasion Edition GC764XX: Interactive CacheSleuth game cache. External

Let's Play A Game: Wordle Edition GC9MH7F: Interactive CacheSleuth game cache. External

Let's Play A Game: WORLDle Edition GC9NK2Z: Interactive CacheSleuth game cache. External

Let's Play A Game: Run T-Rex, Run! GC8Y9GV: Interactive CacheSleuth game cache. External

Let's Play A Game: Sedecordle Edition GC9DH7V: Interactive CacheSleuth game cache. External

Let's Play A Game: Quordle Edition GC9NYRY: Interactive CacheSleuth game cache. External

Let's Play A Game: Murdle Edition GC9RJTY: Interactive CacheSleuth game cache. External

Let's Play A Game: Battleship! GC70HPT: Interactive CacheSleuth game cache. External

Let's Play A Game: BB-Tan Edition GC91T9A: Interactive CacheSleuth game cache. External

Let's Play A Game: Circles Edition GC76H28: Interactive CacheSleuth game cache. External

Let's Play A Game: Clumsy Bird Edition GC74KX4: Interactive CacheSleuth game cache. External

Let's Play A Game: Connections Edition GCAFEAY: Interactive CacheSleuth game cache. Open

Let's Play A Game: Crossy Road Edition GCA6Z5N: Interactive CacheSleuth game cache. External

Let's Play A Game: DNF Assault GC92P9M: Interactive CacheSleuth game cache. External

Let's Play A Game: Duck Hunt Edition GC72D27: Interactive CacheSleuth game cache. External

Let's Play A Game: Hextris Edition GC8N541: Interactive CacheSleuth game cache. External

Let's Play A Game: Mastermind Edition GC72CP0: Interactive CacheSleuth game cache. External

Let's Play A Game: Mathler Easy Edition GC9RNZ8: Interactive CacheSleuth game cache. External

Let's Play A Game: Mathler Edition GC9RNZ9: Interactive CacheSleuth game cache. External

Let's Play A Game: Mathler Hard Edition GC9RNZB: Interactive CacheSleuth game cache. External

Let's Play A Game: Maze Runner Edition GC6Y6KQ: Interactive CacheSleuth game cache. External

Let's Play A Game: Memory Swap Edition GC71VCA: Interactive CacheSleuth game cache. External

Let's Play A Game: Minesweeper Edition GC71B5F: Interactive CacheSleuth game cache. External

Let's Play A Game: Number Slider Edition GC73A7J: Interactive CacheSleuth game cache. External

Let's Play A Game: Pac-Man Edition GC75VE2: Interactive CacheSleuth game cache. External

Let's Play A Game: Peg Game - Norman Edition GC77KX2: Interactive CacheSleuth game cache. External

Let's Play A Game: Picture Sudoku Edition GC764YK: Interactive CacheSleuth game cache. External

Let's Play A Game: Simon Says Edition GC732GP: Interactive CacheSleuth game cache. External

Let's Play A Game: Tetris Edition ▝▙▝▛▝▜ ▟▘▛▘▉ GCA8816: Interactive CacheSleuth game cache. External

Let's Play A Game: Tetris Revenge! GC9R15V: Interactive CacheSleuth game cache. External

Let's Play A Game: Cache Wheel Edition GC752JC: Interactive CacheSleuth game cache. External

Let's Play A Game: The Invisibles GC98CEB: Interactive CacheSleuth game cache. External

Rebus GC83HWJ: Interactive CacheSleuth game cache. External

Brain Teaser #6 GC8JHVY: Interactive CacheSleuth game cache. Open

Super CacheOut GC7TQVQ: Interactive CacheSleuth game cache. External

Draw A Stickman GC7K8Q5: Interactive CacheSleuth game cache. External

Let's Play A Game: 🤔 Emoji Charades Edition GCBAE90: Interactive CacheSleuth game cache. External

Let's Play A Game: ColorFlood Edition GCB4J0M: Interactive CacheSleuth game cache. External

Let's Play A Game: Three Truths & a Lie GCB9QC4: Interactive CacheSleuth game cache. External

Let's Play A Game: FoxiMax Edition GCB4J0H: Interactive CacheSleuth game cache. External

Let's Play A Game: Draw A Perfect Circle GCBDC63: Interactive CacheSleuth game cache. External

Let's Play A Game: Concentration Edition GCB4TX6: Interactive CacheSleuth game cache. External

Going In Circles GCAGGHP: Interactive CacheSleuth game cache. Open

25-Pair Color Code Reference table for 25-Pair Color Code. Open

Adlam Reference table for Adlam. Open

Alien Language Reference table for Alien Language. Open

Alphabet Code Reference table for Alphabet Code. Open

American Sign Language Reference table for American Sign Language. Open

American Sign Language - Color Reference table for American Sign Language - Color. Open

Amohibia Reference table for Amohibia. Open

Ancient Alien Reference table for Ancient Alien. Open

Ancient Hylian Reference table for Ancient Hylian. Open

Andorian Reference table for Andorian. Open

Anillo Reference table for Anillo. Open

Anti-Life Reference table for Anti-Life. Open

Antiker Reference table for Antiker. Open

Aquarius Reference table for Aquarius. Open

Arcadian Reference table for Arcadian. Open

Astronony Symbols Reference table for Astronony Symbols. Open

Ath Reference table for Ath. Open

Atlantis Reference table for Atlantis. Open

Aurebesh Reference table for Aurebesh. Open

Autobot Reference table for Autobot. Open

Ba'ku Reference table for Ba'ku. Open

Baal Reference table for Baal. Open

Baal Diagonal Reference table for Baal Diagonal. Open

Babylonian Numerals Reference table for Babylonian Numerals. Open

Backslash Reference table for Backslash. Open

Bacon Code Reference table for Bacon Code. Open

Ballet Reference table for Ballet. Open

Barcode 39 Reference table for Barcode 39. Open

Beams Reference table for Beams. Open

Bearded Men Reference table for Bearded Men. Open

Birds On A Wire Reference table for Birds On A Wire. Open

Blokscript Reference table for Blokscript. Open

Blork Reference table for Blork. Open

Blox Reference table for Blox. Open

Book Reference table for Book. Open

Borg Reference table for Borg. Open

Box Reference table for Box. Open

Brahmi Reference table for Brahmi. Open

Braille Reference table for Braille. Open

Breath of the Wild Reference table for Breath of the Wild. Open

Builder Code - Marvel Reference table for Builder Code - Marvel. Open

Bynar Reference table for Bynar. Open

Caps Reference table for Caps. Open

Centaur Reference table for Centaur. Open

Centauri Reference table for Centauri. Open

Chappe Reference table for Chappe. Open

Chappe 2 Reference table for Chappe 2. Open

Chappe 3 Reference table for Chappe 3. Open

Chinese Code Reference table for Chinese Code. Open

Chocolate Reference table for Chocolate. Open

Circle Reference table for Circle. Open

Circles Reference table for Circles. Open

Circular Glyphs Reference table for Circular Glyphs. Open

Cistern Reference table for Cistern. Open

Clutter Reference table for Clutter. Open

Code S Reference table for Code S. Open

Codescript Reference table for Codescript. Open

Cold Code Reference table for Cold Code. Open

Color Reference table for Color. Open

Color Music Reference table for Color Music. Open

Colored Squares Reference table for Colored Squares. Open

ColorHoney Reference table for ColorHoney. Open

ColorTokki Reference table for ColorTokki. Open

Conway Reference table for Conway. Open

Covenant Reference table for Covenant. Open

Cybertronic Reference table for Cybertronic. Open

D'Ni Letters Reference table for D'Ni Letters. Open

D'Ni Numbers Reference table for D'Ni Numbers. Open

Dada Urka Reference table for Dada Urka. Open

Dagger Reference table for Dagger. Open

Dancing Men Reference table for Dancing Men. Open

Dancing Men 2 Reference table for Dancing Men 2. Open

Dancing Men 3 Reference table for Dancing Men 3. Open

Dead Spy Scrawls Reference table for Dead Spy Scrawls. Open

Decepticon Reference table for Decepticon. Open

Demon Script Reference table for Demon Script. Open

Devanagari Numerals Reference table for Devanagari Numerals. Open

Dinotopian Reference table for Dinotopian. Open

DLI Reference table for DLI. Open

DNA Reference table for DNA. Open

Doctor Reference table for Doctor. Open

Doop Reference table for Doop. Open

Dorabella Reference table for Dorabella. Open

Dots/Stipplecode Reference table for Dots/Stipplecode. Open

Dotsies Reference table for Dotsies. Open

Drac Reference table for Drac. Open

Draconic Reference table for Draconic. Open

Dragon - Skyrim Reference table for Dragon - Skyrim. Open

Dragon 2 Reference table for Dragon 2. Open

Dragon Runes Reference table for Dragon Runes. Open

Drazi Reference table for Drazi. Open

Droid Reference table for Droid. Open

Dwemeri Reference table for Dwemeri. Open

Efkolia Reference table for Efkolia. Open

Egyptian Hieroglyphics Reference table for Egyptian Hieroglyphics. Open

Elia Reference table for Elia. Open

Enochian Reference table for Enochian. Open

Eternity Reference table for Eternity. Open

Etruscan Reference table for Etruscan. Open

Ewok Reference table for Ewok. Open

Fabrini Reference table for Fabrini. Open

Fairy Reference table for Fairy. Open

Fakoo Reference table for Fakoo. Open

Fennim Reference table for Fennim. Open

Ferengi Reference table for Ferengi. Open

Fez Reference table for Fez. Open

Five Needle Telegraph Code Reference table for Five Needle Telegraph Code. Open

Flags Reference table for Flags. Open

Fonic Reference table for Fonic. Open

Forerunner Reference table for Forerunner. Open

Four Square Reference table for Four Square. Open

Freemason Version 1 Reference table for Freemason Version 1. Open

Freemason Version 2 Reference table for Freemason Version 2. Open

Freeze Marks Reference table for Freeze Marks. Open

Fringe Reference table for Fringe. Open

Futhark Reference table for Futhark. Open

Futurama Reference table for Futurama. Open

Futurama 2 Reference table for Futurama 2. Open

Gaim Reference table for Gaim. Open

Galactic Reference table for Galactic. Open

Galactic 2 Reference table for Galactic 2. Open

Gardner Reference table for Gardner. Open

Geocache Attributes Reference table for Geocache Attributes. Open

Gerudo - Zelda Reference table for Gerudo - Zelda. Open

Giovanni Fontana Reference table for Giovanni Fontana. Open

Glagolitic Reference table for Glagolitic. Open

Glagolitic 2 Reference table for Glagolitic 2. Open

Gnommish Reference table for Gnommish. Open

GoldBug Code Reference table for GoldBug Code. Open

Gravity Falls - Author Reference table for Gravity Falls - Author. Open

Gravity Falls - Bill Reference table for Gravity Falls - Bill. Open

Gravity Falls - Journal Reference table for Gravity Falls - Journal. Open

Great Machine Reference table for Great Machine. Open

Hexacode Reference table for Hexacode. Open

Hexahue Reference table for Hexahue. Open

Hieratic Reference table for Hieratic. Open

HVD Reference table for HVD. Open

Hyach Reference table for Hyach. Open

Hylian Reference table for Hylian. Open

Hylian 64 Reference table for Hylian 64. Open

Hymmnos Reference table for Hymmnos. Open

IChing Hexagrams Reference table for IChing Hexagrams. Open

Iconian Reference table for Iconian. Open

Illuminati Version 1 Reference table for Illuminati Version 1. Open

Illuminati Version 2 Reference table for Illuminati Version 2. Open

Indiana Jones Reference table for Indiana Jones. Open

Japanese Numbers Reference table for Japanese Numbers. Open

Jenks Reference table for Jenks. Open

Kabouter Reference table for Kabouter. Open

Kabouter 1947 Version Reference table for Kabouter 1947 Version. Open

Kargi Reference table for Kargi. Open

KarTrak Reference table for KarTrak. Open

Kenny Code Reference table for Kenny Code. Open

Kilrathi Reference table for Kilrathi. Open

Kix Reference table for Kix. Open

Klingon Reference table for Klingon. Open

Klinzhai - Klingon Reference table for Klinzhai - Klingon. Open

Kokopelli Reference table for Kokopelli. Open

Korean Reference table for Korean. Open

Krakoan Reference table for Krakoan. Open

Kryptonian Reference table for Kryptonian. Open

Leprechaun Reference table for Leprechaun. Open

Letters to Numbers Reference table for Letters to Numbers. Open

Life Reference table for Life. Open

Llort Reference table for Llort. Open

Lord of the Rings Periodic Table Reference table for Lord of the Rings Periodic Table. Open

Lunar Reference table for Lunar. Open

Magicode Reference table for Magicode. Open

Malachim Reference table for Malachim. Open

Malcorian Reference table for Malcorian. Open

Mandalorian Reference table for Mandalorian. Open

Marain Reference table for Marain. Open

Marain 2 Reference table for Marain 2. Open

Markab Reference table for Markab. Open

Mary Queen of Scots Reference table for Mary Queen of Scots. Open

Master of Magic Reference table for Master of Magic. Open

Matoran Reference table for Matoran. Open

Maximal Reference table for Maximal. Open

Mayan Calendar 1 Reference table for Mayan Calendar 1. Open

Mayan Calendar 2 Reference table for Mayan Calendar 2. Open

Mayan Numbers 1 Reference table for Mayan Numbers 1. Open

Mayan Numbers 2 Reference table for Mayan Numbers 2. Open

Maze Reference table for Maze. Open

Meroitic Hieroglyphs Reference table for Meroitic Hieroglyphs. Open

Mesoppotanic Reference table for Mesoppotanic. Open

Minbari Reference table for Minbari. Open

Minimoys Reference table for Minimoys. Open

Mirror Numbers 1 Reference table for Mirror Numbers 1. Open

Mirror Numbers 2 Reference table for Mirror Numbers 2. Open

Moon Reference table for Moon. Open

Morse Mountain Reference table for Morse Mountain. Open

Morseircle Reference table for Morseircle. Open

Murray Version 1 Reference table for Murray Version 1. Open

Murray Version 2 Reference table for Murray Version 2. Open

Murray Version 3 Reference table for Murray Version 3. Open

Murray Version 4 Reference table for Murray Version 4. Open

Music Sheet Reference table for Music Sheet. Open

N'Ko Reference table for N'Ko. Open

Narn Reference table for Narn. Open

NATO Flags Reference table for NATO Flags. Open

NATO Phonetic Alphabet Reference table for NATO Phonetic Alphabet. Open

Nazcaan Reference table for Nazcaan. Open

Nuha Reference table for Nuha. Open

Number Pad Lines Reference table for Number Pad Lines. Open

Numikki Reference table for Numikki. Open

Nyctographic Reference table for Nyctographic. Open

Ogham Reference table for Ogham. Open

Ophidean Reference table for Ophidean. Open

Orkhon Reference table for Orkhon. Open

Outer Rim Reference table for Outer Rim. Open

Pakmara Reference table for Pakmara. Open

Pasley Reference table for Pasley. Open

Pentadic Reference table for Pentadic. Open

Periodic Table Reference table for Periodic Table. Open

Pictish Swirl Reference table for Pictish Swirl. Open

Pig Pen Version 1 Reference table for Pig Pen Version 1. Open

Pig Pen Version 2 Reference table for Pig Pen Version 2. Open

Pipeline Reference table for Pipeline. Open

Pixel Reference table for Pixel. Open

Planet Reference table for Planet. Open

Planet Barcode Reference table for Planet Barcode. Open

Pool Balls Reference table for Pool Balls. Open

Popham Reference table for Popham. Open

Postnet Barcode Reference table for Postnet Barcode. Open

Precursor Reference table for Precursor. Open

Predacon Reference table for Predacon. Open

Predator Reference table for Predator. Open

Preservers Reference table for Preservers. Open

Puzzle Reference table for Puzzle. Open

Puzzle Code (Black) Reference table for Puzzle Code (Black). Open

Quadoo Reference table for Quadoo. Open

R2 Units - Star Wars Reference table for R2 Units - Star Wars. Open

Reality Reference table for Reality. Open

Red Herring Reference table for Red Herring. Open

Resident Alien Reference table for Resident Alien. Open

Resistor Color Code Reference table for Resistor Color Code. Open

Retrospection Reference table for Retrospection. Open

Rich Reference table for Rich. Open

Riddler Reference table for Riddler. Open

Romulan Reference table for Romulan. Open

Rosicrucian Reference table for Rosicrucian. Open

Royal Mail (RM4SCC) Reference table for Royal Mail (RM4SCC). Open

San Luca Reference table for San Luca. Open

Segment Display (7-Segment) Reference table for Segment Display (7-Segment). Open

Seltorian Reference table for Seltorian. Open

Semaphore - Stick Men Reference table for Semaphore - Stick Men. Open

Semaphore Clocks Reference table for Semaphore Clocks. Open

Semaphore Flags Reference table for Semaphore Flags. Open

Semaphore Man Reference table for Semaphore Man. Open

Semaphore Trousers Reference table for Semaphore Trousers. Open

Shadow Reference table for Shadow. Open

Sheliak Reference table for Sheliak. Open

Shoes Code Reference table for Shoes Code. Open

Sign Reference table for Sign. Open

Simlish (From The Sims) Reference table for Simlish (From The Sims). Open

Sith Reference table for Sith. Open

Slash and Pipe Reference table for Slash and Pipe. Open

Snooker Reference table for Snooker. Open

Solresol Reference table for Solresol. Open

Son'a Reference table for Son'a. Open

Space Invaders Reference table for Space Invaders. Open

Spick Reference table for Spick. Open

Spintype Reference table for Spintype. Open

Sprykski Reference table for Sprykski. Open

Square Glyphs Reference table for Square Glyphs. Open

Star Wars Periodic Table Reference table for Star Wars Periodic Table. Open

Stargate Universe Reference table for Stargate Universe. Open

Sticks Reference table for Sticks. Open

Stray Reference table for Stray. Open

Sumerian Reference table for Sumerian. Open

Symbolica Reference table for Symbolica. Open

Takcha Reference table for Takcha. Open

Tap (Knock) Code Reference table for Tap (Knock) Code. Open

Tau Reference table for Tau. Open

Templar Reference table for Templar. Open

Tenctonese Reference table for Tenctonese. Open

Tengwar Reference table for Tengwar. Open

Terzi Reference table for Terzi. Open

Tetragrammaton Reference table for Tetragrammaton. Open

Theban Reference table for Theban. Open

Tholian Reference table for Tholian. Open

Three Square Reference table for Three Square. Open

Tic Tac Toe Reference table for Tic Tac Toe. Open

Tifinagh Reference table for Tifinagh. Open

Time Reference table for Time. Open

Tkon Reference table for Tkon. Open

TLL Code Reference table for TLL Code. Open

Tomtom Reference table for Tomtom. Open

Trees Reference table for Trees. Open

Triangle Reference table for Triangle. Open

Triangles Reference table for Triangles. Open

Trolls Alphabet Reference table for Trolls Alphabet. Open

Ugaritic Reference table for Ugaritic. Open

Ulog Reference table for Ulog. Open

Umbaran - Star Wars Reference table for Umbaran - Star Wars. Open

Unitology Reference table for Unitology. Open

Unown - Pokemon Alphabet Reference table for Unown - Pokemon Alphabet. Open

US State Flags Reference table for US State Flags. Open

Utopian Reference table for Utopian. Open

Vanity Code Reference table for Vanity Code. Open

Video Game Reference table for Video Game. Open

Vidiian Reference table for Vidiian. Open

Visitor Reference table for Visitor. Open

Voodoo Reference table for Voodoo. Open

Vorlon Reference table for Vorlon. Open

Voth Reference table for Voth. Open

Vulcan - Modern Reference table for Vulcan - Modern. Open

Vulcan - Old Reference table for Vulcan - Old. Open

Wakanda Reference table for Wakanda. Open

Window Reference table for Window. Open

Wraith Reference table for Wraith. Open

Xelbet Reference table for Xelbet. Open

Yan Koryani Reference table for Yan Koryani. Open

Ygyde Reference table for Ygyde. Open

Yin Yang Reference table for Yin Yang. Open

Zentlardy Reference table for Zentlardy. Open

Zeti Reference table for Zeti. Open

Zodiac Reference table for Zodiac. Open

Zodiac Killer Reference table for Zodiac Killer. Open