JS Minifier
Minify JavaScript in your browser — strip comments and whitespace to reduce file size for faster loads. Free.
Minify JavaScript
Paste JS to strip comments and blank lines. Lightweight and safe.
Features
Common use cases
- 1Quickly shrinking a script
- 2Stripping comments before sharing
- 3Reducing an inline script
- 4Cleaning up whitespace
- 5Comparing before/after size
- 6A fast, dependency-free trim
Related tools
About JavaScript minification
This is a lightweight minifier: it removes comments, indentation and blank lines to shrink a script, but deliberately does not rename variables or reflow code — those transforms can break subtly on strings and regular expressions.
For production, use a proper minifier like Terser or your bundler, which safely renames identifiers and dead-code-eliminates for much bigger savings. This tool is for a quick, safe trim and runs entirely in your browser.
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Got Questions? We Have Answers.
What does it do?
It removes comments and unnecessary whitespace to shrink your JavaScript. It is a lightweight minifier, not a full compressor.
Should I use it for production builds?
For serious builds use Terser or esbuild, which also rename variables and do dead-code elimination. This tool is for quick, safe size reductions.
Is my code uploaded?
No. Minification runs entirely in your browser.
Will it break my code?
It only strips comments and whitespace, so behaviour is preserved. Always test the output, especially with unusual formatting.