This online calculator tries to decode substitution cipher without knowing the key. It uses genetic algorithm over text fitness function to break the encoded text.

Tool to encrypt / decrypt a message by substitution cipher (all sizes) by replacing one or more characters with one or more others

Tool to automatically or manually solve substitution ciphers. The substitution ciphers is one of the oldest classical ciphers. Each letter is replaced by a different letter of the alphabet, so solving …

As an example here is an English cryptogram this tool can solve: A Python implementation of this breaker is provided on GitLab. If you want to break a polyalphabetic cipher instead try the …

Crafted by Wierk. A monoalphabetical substitution cipher uses a fixed substitution over the entire message. The ciphertext alphabet may be a shifted, reversed, mixed or deranged version of …

Decode any substitution cipher instantly with our advanced AI-powered solver. Features automatic detection, interactive mapping, and step-by-step assistance. Decode substitution …

Free online Simple Substitution cipher tool. Encrypt and decrypt text using a custom alphabet mapping with interactive visualization and key generation options.

Keyword cipher decoder online. Decode keyword substitution ciphers with frequency analysis.

Paste your cipher text in to the text box and click Analyze. You will be provided with two tabs showing the frequencies of your cipher text, use the dropdowns or the buttons to quickly 'try …

Enter a keyword, phrase or alphabet and the rest will be calculated for you.