This formatter restores readable structure to JavaScript: consistent indentation per block, spacing around operators, and statements on their own lines. It is what you reach for when you need to understand a minified bundle, a snippet pasted from a tag manager, or code that has been hand-edited into an inconsistent mess. Worth knowing: beautifying a minified file restores layout but not meaning — variable names that were mangled to a, b and c stay mangled, because that information was destroyed at build time. For production code, always work from source and a source map. Everything runs locally, so proprietary or client code is never uploaded.
Free, fast, and runs entirely in your browser — no signup, no upload to a server.