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JS Minifier
Minify and compress JavaScript code instantly. Reduce file size with Terser-style compression and improve load speed.
How to use this tool
- Paste JavaScript, choose compression and mangling options, then run minification.
- Review minified output size and optional source map for debugging workflows.
- Copy or download minified code and map files for deployment or testing.
Best use cases
- Quickly test compression impact before changing build pipeline settings.
- Create compact repro snippets for bug reports and support threads.
- Compare optimization options when tuning bundle size and parse time.
Practical notes
- Keep readable source for maintenance and local debugging.
- Use source maps in production observability workflows when minifying aggressively.
- Validate behavior after toggling mangling or toplevel optimization settings.
FAQ
- Does this support modern JavaScript syntax?
- Yes. Minification uses Terser in-browser and handles current ECMAScript syntax.
- Will minification break modules?
- Module syntax is preserved, but you should still test app behavior after optimization.
- Is my code uploaded?
- No. Minification runs locally in your browser session.
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