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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