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  • CSV table to JSON array

    This online calculator converts CSV table to JSON array of objects, using given map of CSV columns to object properties.

  • List reverser

    This online calculator reverses lines of text

  • Numbered list maker

    This online calculator numbers lines of text

  • Random Letters Generator

    This online generator just generates specified number of symbols, randomly selecting them from given set of symbols

  • Text fitness

    This online calculator computes text "fitness". That is, how similar the given text to other texts written in English language.

  • Text fitness (version 2)

    This online calculator calculates measure known as fitness score, of how given text is similar to a typical English text. It uses frequencies of unigrams, bigrams and trigrams to calculate fitness score. The reference frequencies are calculated from Leipzig Corpora Collection and can be downloaded from http://practicalcryptography.com/cryptanalysis/text-characterisation/quadgrams/. The less value you get, the better.

  • 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.

  • Email extractor

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

  • HTML table to JSON array

    Th calculator converts the html table code to JSON array with optional data transpose and compression. It also visualizes numeric data on chart.

  • List Join

    This online calculator can join two csv lists by key column the same way JOIN works in SQL (inner join, left outer join, right outer join)

  • 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.

  • Palette generator

    This calculator generates palette of colors from starting color to ending color, using maximum diversity, "rainbow" style.

  • RAID arrays сalculator

    This calculators shows the possible variants of RAID arrays, based on the number of drives available.

  • Relative luminance and contrast ratio

    Two calculators evaluate the relative luminance and contrast ratio for given colors.

  • RGB - HSV and HSV - RGB converter

    This calculator converts RGB color to HSV color and vise versa

  • GET request string parser

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

  • List format

    Format a list using regular expressions

  • URL-encoded string decoder

    This converter decodes URL-encoded string (percent-encoded characters). It converts reserved characters as well as UTF-8 characters

  • 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.

  • 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