Developer tools
Small utilities that run entirely in your browser. Nothing you paste is uploaded, logged or sent anywhere — there is no server involved.
JSON Formatter
Format, validate and minify JSON, with the error located by line.
CSS Gradient Generator
Build a linear or radial gradient and copy the CSS.
QR Code Generator
Turn a link or any text into a QR code and download it as a PNG.
JSON Validator
Check whether JSON is valid and see what is inside it.
Base64 Encoder / Decoder
Encode and decode Base64. Handles emoji and accents correctly.
URL Encoder / Decoder
Percent-encode and decode URLs and query strings.
Hash Generator
SHA-1, SHA-256, SHA-384 and SHA-512, computed on your machine.
UUID Generator
Random v4 UUIDs from the browser’s cryptographic generator.
Password Generator
Strong random passwords with a real entropy figure.
Lorem Ipsum Generator
Placeholder text by paragraph, sentence or word.
Timestamp Converter
Unix time to a readable date, and any date back to Unix time.
Colour Converter
HEX, RGB and HSL, converted in every direction.