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  • Gravity Falls Author's symbol substitution cipher decoder

    This online calculator can decode messages written in the Author's symbol substitution cipher

  • Gravity Falls Bill's symbol substitution cipher decoder

    This online calculator can decode messages written with Bill's symbol substitution cipher

  • Index of Coincidence

    This online calculator calculates index of coincidence (IC, IOC) for the given text

  • PATHFINDER cipher checker

    This online calculator decrypts digits encrypted by PATHFINDER type of cipher.

  • Pigpen cipher decoder

    This online calculator can decode messages written in the pigpen cipher

  • 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".

  • Standard Galactic Alphabet decoder

    This online calculator can decode message written with standard galactic alphabet symbols

  • Substitution Cipher Tool

    The tool to encrypt/decrypt messages with simple substitution cipher given as key. It is also useful for manual cryptanalysis of substitution cipher - when you have message written in English alphabet partially decrypted with automatic tool and want to tweak the key.

  • Vigenère cipher breaker

    This online calculator tries to decode Vigenère cipher without knowing the key. It uses the index of coincidence technique.

  • Playfair cipher

    This online calculator encrypts and decrypts a message given Playfair cipher keyword. Non-alphabetic symbols (digits, whitespaces, etc.) are ignored.

  • A1Z26 cipher

    A1Z26 is very simple direct substitution cypher, where each alphabet letter is replaced by its number in the alphabet.

  • Atbash cipher

    This calculator allows you to encrypt and decrypt text with Atbash method

  • Hill cipher

    This calculator uses Hill cipher to encrypt/decrypt a block of text

  • Caesar cipher

    Calculator encrypts entered text by using Caesar cipher. Non-alphabetic symbols (digits, whitespaces, etc.) are not transformed.