JavaScript Minifier Tool
Trim JavaScript by removing comments and collapsing whitespace, with a string- and template-literal-aware parser so your code and text stay intact. It is a safe whitespace/comment minifier — for full variable mangling, use your build tool. Runs in your browser.
- 100% free
- Private & safe
- Runs in your browser
Why use JavaScript Minifier?
JavaScript Minifier is a quick, no-nonsense developer utility that runs entirely client-side, so your code and data never leave your machine.
- Runs instantly in your browser — nothing to install, nothing uploaded.
- Completely free, with no account, no watermarks and no usage limits.
- Input/Output: JavaScript
- Paste your JavaScript.
- Works on any device — desktop, tablet and phone — and is fully keyboard accessible.
How to use JavaScript Minifier
- Paste your JavaScript.
- Click Minify.
- Comments and extra whitespace are removed safely.
- Copy or download the result.
Examples
- Removing comments before shipping a snippet.
- Shrinking a small inline script.
Supported formats & limits
- Input/Output: JavaScript
Limitations
- Removes comments and whitespace only — it does not rename variables or perform tree-shaking (use a bundler like esbuild/terser for that).
Frequently asked questions
Will it break my code?
It is string- and comment-aware, so strings, template literals and regex are preserved. Review the output before shipping.
Does it mangle variable names?
No — that requires a full parser; use a build tool for maximum compression.
Uploaded?
No — it runs entirely in your browser.
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