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. This tool uses …

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.

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

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

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

Tool to solve substitution ciphers either manually or with an intelligent autosolver. Live letter-translation grid and key string stay in sync with instant output updates.

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

The Affine cipher is a type of monoalphabetic substitution cipher where each letter is mapped using a mathematical function (E(x) = (ax + b) mod m). This tool lets you encode and decode …