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Caesar cipher
Calculator encrypts entered text by using Caesar cipher. Non-alphabetic symbols (digits, whitespaces, etc.) are not transformed.
Hill cipher
This calculator uses Hill cipher to encrypt/decrypt a block of text.
Atbash cipher
This calculator allows you to encrypt and decrypt text with Atbash method
A1Z26 cipher
A1Z26 is very simple direct substitution cypher, where each alphabet letter is replaced by its number in the alphabet.
Standard Galactic Alphabet decoder
This online calculator can decode message written with standard galactic alphabet symbols
Rail fence cipher
This article contains two calculators, first can be used to encode message with the rail fence cipher, second can be used to crack message encoded with the rail fence cipher by brute force. Decoded simply outputs decoded message for different number of "rails".
PATHFINDER cipher checker
This online calculator decrypts digits encrypted by PATHFINDER type of cipher.
Playfair cipher
This online calculator encrypts and decrypts a message given Playfair cipher keyword. Non-alphabetic symbols (digits, whitespaces, etc.) are ignored.
Gravity Falls Bill's symbol substitution cipher decoder
This online calculator can decode messages written with Bill's symbol substitution cipher
Gravity Falls Author's symbol substitution cipher decoder
This online calculator can decode messages written in the Author's symbol substitution cipher
Pigpen cipher decoder
This online calculator can decode messages written in the pigpen cipher
Index of Coincidence
This online calculator calculates index of coincidence (IC, IOC) for the given text
Vigenère cipher breaker
This online calculator tries to decode Vigenère cipher without knowing the key. It uses the index of coincidence technique.
Substitution cipher tool
A tool to encrypt/decrypt messages with a simple substitution cipher given as the key. It is also useful for manual cryptanalysis of a substitution cipher - when you have a message written in the English alphabet partially decrypted with an automatic tool and want to tweak the key.
Substitution cipher decoder
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. The calculator logic is explained below the calculator.
Kasiski test
This online calculator performs Kasiski examination of an entered text using trigrams in attempt to discover a key length
Caesar cipher with numbers
This online calculator applies Caesar cipher not only to the letters, but to the numbers as well. Numbers expands the alphabet and are included to the rotations. Other symbols except letters and numbers are not transformed.
A2Z52 encoder/decoder
A2Z52 is a very simple direct substitution cipher, where each alphabet letter is replaced by its number in the alphabet.
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