Free Online Tools
A collection of free encoding and decoding tools for puzzles, cryptography, and more. No signup required.
Letters to Numbers Converter
Convert letters to their numeric positions (A=1, B=2...Z=26). Supports A1Z26, ASCII, hexadecimal, and binary encoding.
YAML to INI Converter
YAML to INI Converter - Free online bidirectional configuration file converter. Transform YAML to INI format instantly or convert INI to YAML. Perfect for DevOps, developers, and system administrators.
JSON to Java Code Generator
JSON to Java code generator - Free tool to convert JSON schema into Java Object with private variables, getter/setter methods, and inner classes for nested objects.
Mayan Numeral Converter
Mayan Numeral Converter - Convert decimal numbers to ancient Mayan base-20 vigesimal numerals with visual dot, bar, and shell symbols. Learn about the sophisticated mathematics of the Maya civilization.
Babylonian Numeral Converter
Babylonian Numeral Converter - Convert decimal to base-60 Babylonian numerals using ancient cuneiform symbols. Learn about the sexagesimal system inherited from Sumerians and Akkadians.
PX To VW Converter
PX To VW Converter - Free responsive design tool to convert between pixels (px) and viewport width (vw) CSS units. Perfect for creating responsive layouts with preset viewport sizes.
Camel Case Converter
Camel Case Converter - Convert any text to camelCase or PascalCase format instantly. Supports snake_case, kebab-case, space-separated text, and batch processing for multiple lines.
Line Ending Converter
Line Ending Converter - Convert line endings between Windows (CRLF), Unix/Mac (LF), and old Mac (CR) formats for cross-platform compatibility.
Decimal to Hexadecimal Converter Online
Decimal to Hexadecimal Converter Online - Convert decimal numbers to hexadecimal format instantly. Supports values up to 19 digits. Free online conversion tool.
Cistercian Numerals Converter
Cistercian Numerals Converter - Convert decimal numbers to medieval Cistercian numerals. Learn about the Cistercian monks' number system with complete symbol chart and historical context.
Egyptian Numbers Converter
Egyptian Numbers Converter - Convert decimal numbers to ancient Egyptian numerals and hieroglyphic symbols. Learn about the Egyptian numeral system used from 3000 BC.
Fill In The Blanks Equation Solver
Fill In The Blanks Equation Solver - Solve math puzzles with missing digits or operators. Enter equations with ? and find all possible solutions instantly. Free online tool.
Skip Cipher
Skip Cipher - Jump Cipher online encryption and decryption tool. Encrypt messages using transposition cipher, decrypt with brute force parameter finder. Learn about skip cipher cryptography.
Blossom Solver
Blossom Solver - Help solve Merriam-Webster Blossom daily word game. Find all valid words from 7 letters (1 center + 6 petal letters). Get high scores and pangrams. Free online game helper.
Longest Word Using These Letters Solver
Longest Word Using These Letters Solver - Find the longest words you can make from any set of letters. Instantly discover all possible words ranked by length with filtering options. Free online word game helper.
Playfair Cipher Solver
Playfair Cipher Solver - Encrypt and decrypt text using the classic digraph substitution cipher. Learn about this historic cipher invented by Charles Wheatstone and explore the 5x5 key square mechanics.
Hexahue Cipher
Hexahue Cipher - Color-based encoding system that translates text to visual blocks. Invented by Josh Cramer, use combinations of common colors for unique visual communication.
Atbash Cipher Decoder
Atbash Cipher Decoder - Encrypt and decrypt messages using the mirror alphabet substitution cipher. An involutory cipher where the same process works for both encryption and decryption.
Tapcode Translator
Tapcode Translator - Convert messages to tap code using the 5x5 grid cipher. Used by prisoners in Vietnam War POW camps. Encode with dots, numbers, or knock patterns instantly.
A0Z25 Cipher Translator
A0Z25 Cipher Translator - Free zero-indexed letter-to-number encoding tool where A=0, B=1, through Z=25. Encode and decode messages instantly with support for multiple encoding formats.
Numbers to Letters Converter
Convert numbers back into letters. Decode A1Z26, A0Z25, ASCII, hex, and binary encoded messages instantly.
NATO Phonetic Alphabet Translator
Convert text to NATO/ICAO phonetic alphabet and other spelling alphabets including Dutch, German, Swedish, and Russian.
Phone Number Converter
Convert vanity phone numbers like 1-800-FLOWERS to digits or see letter options for any phone number using the telephone keypad.
Cipher Identifier
Analyze encrypted text and identify the cipher or encoding type. Detects Base64, hex, binary, A1Z26, Morse code, Caesar cipher, and more.
Spectrogram Decoder
Free spectrogram decoder tool to analyze audio frequencies and detect hidden messages. Upload WAV, FLAC, OGG, MP3, or M4A files to generate spectrograms for audio steganography analysis.
Book Cipher Decoder
Decode hidden messages using book references. Enter book text and numerical codes (page:line:word) to reveal secret messages encoded in literature.
Password Strength Tester
Test your password security and see how long it would take to crack. Get real-time feedback on password strength with entropy analysis.
Escape Room Builder
Create and share your own escape room puzzles! Build cipher challenges using A1Z26, Morse code, binary, and riddles. Share via URL - no account needed.
Enigma Machine Emulator
Simulate the legendary World War II Enigma encryption device. Configure rotors, reflectors, ring settings, and plugboard to encrypt and decrypt authentic Enigma cipher messages.
Monoalphabetic Substitution Cipher
Encrypt and decrypt messages using monoalphabetic substitution ciphers. Create custom substitution keys, analyze letter frequencies, and solve ciphers with interactive mapping.
Anagram Solver with Wildcard
Find all possible words from your letters with wildcard support. Filter by starting letter, ending letter, containing letters, or exact word length.
Cryptogram Generator
Create custom cryptogram generator puzzles to challenge your friends. Generate substitution cipher cryptograms with adjustable difficulty levels and share via link.
Cryptogram Solver
Free cryptogram solver tool to decode substitution cipher puzzles. Analyze letter frequencies, manipulate text, and solve cryptograms with interactive tools.