JavaScript Minifier
Compress JavaScript to reduce file size
JavaScript Minifier is a free online tool from BrowserUtils that compress javascript to reduce file size. It runs entirely in your browser — your data never leaves your device. No account required.
How to use JavaScript Minifier
- 1 Paste or type your input into the editor above.
- 2 The tool processes your data instantly — right in your browser, with nothing sent to a server.
- 3 Copy the result with one click or continue editing your input.
About JavaScript Minifier
Free online JavaScript minifier. Remove whitespace, comments, and unnecessary characters from JavaScript to reduce file size. This tool runs entirely in your browser — your data is never sent to a server. Just paste your input, get instant results, and copy with one click. No sign-up or installation required.
JavaScript Minifier specs
- Runtime
- 100% client-side (browser)
- Cost
- Free — no account, no rate limits, no usage caps
- Browser support
- Chrome 90+, Firefox 88+, Safari 14+, Edge 90+
- Part of
- 299 developer tools on BrowserUtils (100% client-side)
Questions
How do I minify JavaScript to improve load times?
Paste your JavaScript into the input field and the minifier will strip all comments, remove unnecessary whitespace, and collapse the code to produce a compact output that reduces file size and improves page load performance.
Is minified JavaScript still functional?
Yes, minified JavaScript executes identically to the original. Only non-essential characters like comments, extra whitespace, and line breaks are removed. All logic, variables, and function calls remain intact.
Does the JavaScript minifier rename variables?
No, this minifier focuses on whitespace and comment removal. It does not perform variable renaming (mangling). For deeper compression with variable shortening, use a build tool like Terser or esbuild.
Can I minify JavaScript that uses ES modules?
Yes, the minifier handles modern JavaScript syntax including import/export statements, arrow functions, template literals, and async/await without any issues.
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