Developer Tools
Formatters, converters and decoders for everyday development work.
These tools run in your browser. Nothing you enter is uploaded or stored.
CSV to JSON
Turns a spreadsheet-style CSV table into a JSON list you can use in code.
Colour Code Converter
Converts a colour between HEX, RGB and HSL, and shows you a live swatch of it.
Hash Generator
Produces MD5, SHA-1, SHA-256 and SHA-512 fingerprints of a piece of text.
JSON Formatter
Tidies up JSON so it is readable, or squashes it down to the smallest possible size.
JSON Validator
Checks whether a piece of JSON is valid and tells you exactly where it goes wrong.
JWT Decoder
Opens up a JSON Web Token so you can read its header and contents. It does not check the signature.
Regex Tester
Tries a regular expression against sample text and highlights everything it matches.
Timestamp Converter
Converts a Unix timestamp into a readable date and time, and back again.
XML Formatter
Indents XML so the structure is easy to follow, or collapses it onto one line.