Cipher & Encoding Tools Collection

Ancient Hebrew letter reversal cipher

Letter shifting cipher used by Julius Caesar

Polyalphabetic substitution cipher

Reciprocal polyalphabetic substitution cipher

Transposition cipher using zigzag pattern

Ancient rod-based transposition cipher

Keyword-based transposition using column order

5×5 grid substitution cipher

Polybius square cipher with columnar transposition

6x6 Polybius cipher for letters and digits with transposition

Polybius square fractionating cipher

Binary encoding using two symbols

Mathematical substitution cipher

Matrix-based polygraphic cipher

Digraph substitution cipher

Four 5×5 matrix polygraphic cipher

Digraph substitution cipher using two keyed 5×5 squares

Reciprocal Vigenère cipher variant

Self-synchronizing stream cipher

Polyalphabetic cipher using a long non-repeating key text

Vigenere-style cipher using a repeating numeric key

One-to-many substitution cipher

Keyed monoalphabetic substitution cipher

Rotor cipher simulator with plugboard and ring settings

Line-word-character cipher using a shared source text

Polybius square cipher with a repeating numeric key

Binary to text encoding scheme

Human-friendly encoding used in Bitcoin-style identifiers

Percent-encoding for URLs

Convert special characters to HTML entities

Convert between Unicode formats

Internationalized domain names encoding

Convert between number systems

Text to ASCII codes conversion

Convert text to decimal character codes and back

IBM CP037 text and byte conversion

Convert text to octal ASCII values and back

Simple letter and character rotation

Unix-to-Unix encoding

MIME encoding for email

Binary encoding for Usenet

5-bit teleprinter code with letters/figures shifts

Dots and dashes telegraph code

5x5 knock cipher for silent communication

Tactile writing system converter

ASL fingerspelling alphabet

International Phonetic Alphabet

Chinese romanization system

Traditional/Simplified Chinese

Upper/lower/title case conversion

Encode and decode Pig Latin text

Spell text with Alfa Bravo Charlie code words

Reverse text and words

Reverse the sequence of words while keeping text readable

Create mirrored text effect

Convert to vertical writing

Text to emoji conversion

Hide secret text inside plain-looking Unicode text

Format, validate and analyze JSON data

Detect likely encodings and simple classical ciphers

Analyze ciphertext statistics and substitution clues

Universal code using Fibonacci numbers

Binary numeral system variant

Error detection and correction

Cyclic error-correcting codes

Error correction for data transmission

Cyclic redundancy check

Simple error detection

Measure difference between strings

128-bit hash function

SHA-1/256/512 hash functions

Checksum algorithms

Fast checksum algorithm

Keyed-hash message authentication

Password hashing function

Modern password hashing

Estimate password entropy and weak patterns

Detect likely MD5, SHA, bcrypt, Argon2 and checksum formats

Verify file integrity