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Regular expression tester
This online calculator allows user to experiment with regular expressions.
Text Formatter
The calculator is designed to reformat lines of text according to user specifications.
URL Unescape Calculator
The calculator for URL decoding, also known as unescaping, takes a URL-encoded string and converts it back to its original form.
GET Request String Parser
The GET Request String Parser is a handy tool for breaking down HTTP GET request strings into parameter-value pairs and decoding URL-encoded sequences if necessary. By using this parser, you can easily extract and analyze the individual components of a GET request.
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.
UTF-8 encoded string
The calculator converts an input string to a UTF-8 encoded binary/decimal/hexadecimal dump and vice versa.
Text file encoding
You can use this calculators to encode a text with an encoding.
This calculator compresses/decompresses a string using Lempel-Ziv-Welch (LZW) algorithm.
Unicode scripts and blocks
The calculators for counting number of characters per different Unicode blocks and Unicode scripts for a given text.
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