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  • Base 64 encoding and decoding

    The calculators encode string to base64 string and decode back to original string. Special characters (+/) , generally produced by base64 algorithm, can be replaced by the data provided in additional parameter.

  • Binary Coded Decimal (BCD)

    This online calculator converts decimal number to binary code in BCD notation and vice versa

  • Binary, inverse and complement codes

    Binary, one's complement (inverse) and two's complement codes (calculator was created by user's request)

  • Caesar cipher

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

  • Conversion between two positional numeral systems

    This calculator converts number from one numeral system to another, given both system's bases

  • Conversion from decimal numeral system

    This calculator converts given decimal value to other positional numeral system

  • Conversion of fractional numbers between numeral systems

    This online calculator helps to convert fractional number in one numeral system to fractional number in other numeral system.

  • Count the number of words

    The calculator counts word number in a given text. It can be used for rough calculation of translation cost. Can be used for word number calculation in software resources.

  • Email extractor

    This online calculator parses emails from block of text using regular expression

  • GET request string parser

    This parser break GET request string to the parameter-value pairs and decodes URL-encoded sequences, if needed

  • Hill cipher

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

  • Huffman coding

    This online calculator generates Huffman encoding for given frequency of occurrence of symbols.

  • LL1 grammar analysis. Yet another top-down parser generator.

    The calculator checks LL1 grammar correctness, parses a text using the grammar, shows FIRST, FOLLOW and FIRST PLUS sets, parsing tree and gives PLANETCALC parsing code.

  • Regular expression tester

    This online calculator allows user to experiment with regular expressions.

  • Shannon Entropy

    This online calculator computes Shannon entropy for a given event probability table and for a given message

  • Simple math in any numeral system

    This online calculator supports simple math (addition, subtraction, division, multiplication and power) for numbers expressed in any numeral system - binary, octal, hexadecimal, from the base 2 to base 36

  • Symbol frequencies table

    This online calculator builds symbol frequency table for a given message

  • Vigenère cipher

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

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