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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

  • Index of Coincidence

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

  • Pigpen cipher decoder

    This online calculator can decode messages written in the pigpen cipher

  • 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.

  • Caesar cipher

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

  • Vigenère cipher

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