Dev Gadgets

A single place for the small conversions and lookups you'd otherwise search for every time — color formats, encodings, timestamps, and a few generators. 66 tools, no ads, nothing saved anywhere but your own browser.

Color

HEX / RGB / HSL ConverterConvert colors between HEX, RGB, and HSL notation.

Text & Data

JSON Formatter & ValidatorPretty-print, minify, and validate JSON with error locations.
Regex TesterTest a regular expression against sample text and inspect matches.
CSS Unit ConverterConvert between px, rem, em, and pt with a configurable base size.

Encoding

Numeral Systems

Length

Time

Generators

Info