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Developer Tools
Base64, URL and HTML encoding, JSON formatting and UUIDs — all in the browser. · 10 tools
Small, fast utilities for everyday development work: the encoders and decoders you need when debugging a request, a JSON formatter that pinpoints the exact line of a syntax error, and a UUID generator backed by the browser’s cryptographic random source. Pair them with the Unix timestamp, binary and number base converters in the Converters section.
Base64 Encode & Decode OnlineFree Base64 encoder and decoder: convert text to Base64 and Base64 back to text (UTF-8 safe), URL-safe…CSS Formatter & BeautifierFree CSS formatter: beautify minified or messy CSS with consistent indentation (2 or 4 spaces, tabs), one…CSS MinifierFree CSS minifier: strip comments, whitespace and redundant syntax to shrink a stylesheet by 20–40 % without…HTML Encoder & DecoderFree HTML encoder and decoder: escape < > & " ' as HTML entities so code shows as text, optionally encode…JavaScript Formatter & BeautifierFree JavaScript formatter: beautify minified or messy JS with Prettier — 2 or 4 spaces or tabs, semicolons…JavaScript MinifierFree JavaScript minifier powered by Terser: remove whitespace and comments, shorten variable names and apply…JSON Formatter, Validator & Minifier OnlineFree JSON formatter: pretty-print JSON with 2 or 4 spaces or tabs, validate it with the exact error line and…URL Encoder & DecoderFree URL encoder and decoder: percent-encode text for query strings (encodeURIComponent) or whole URLs…UUID GeneratorFree UUID generator: create one or hundreds of version 4 (random) or version 7 (time-ordered) UUIDs/GUIDs…XML Formatter & BeautifierFree online XML formatter: pretty-print messy XML with 2 or 4 spaces or tabs, validate it and see the exact…