|Regular expression tester
This online calculator allows user to experiment with regular expressions.
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.
|Convert RGB integer colours to hexadecimal color code for web
The calculator converts a colour given in RGB integers into a hexadecimal string suitable, for example, for css.
|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.
|Largest common subsequence
This online calculator is designed to find the largest common subsequence of two subsequence given as strings.