Cipher Identifier Stuck with a cipher or secret code? This free tool will help you identify the type of encryption, as well as give you guidance about solving it and any available cipher decoder. …

Shifts letters by a chosen rotation to encode or decode Caesar ciphers, with an easy way to try multiple shifts.

Encrypts, decrypts, or cracks text with the Vigenère cipher, and ranks candidates to find the most likely plaintext.

Encodes and decodes the mirrored-alphabet Atbash cipher (A↔Z, B↔Y), a classic monoalphabetic substitution.

A1Z26 Cipher Decoder Translates between letters and numbers using the classic A=1…Z=26 mapping and common variants.

Encodes and decodes Pigpen (Masonic) cipher symbols by mapping glyphs to letters.

Encodes and decodes the Playfair digraph cipher using a keyed square and pair-substitution rules.

A simple substitution cipher rearranges the alphabet so every ciphertext letter consistently stands in for another letter or symbol. This page is a complete guide to substitution ciphers plus a …

Columnar Transposition Cipher Encrypts and decrypts columnar transposition by rearranging text according to a keyword-defined column order.

A polyalphabetic cipher that uses a keyword to create multiple Caesar shifts throughout the message. Though commonly studied in cryptography, it can appear in some advanced …