JavaScript Minifier
Minify JavaScript conservatively.
Paste JavaScript to strip comments and collapse extra whitespace. This is a conservative minifier — it preserves strings, template literals and regex, and keeps newlines so automatic semicolon insertion still works. It does not rename variables. Everything runs locally in your browser.
Conservative minifier: removes comments and extra whitespace; it does not rename variables. For full minification use a build tool.
Your input is processed locally in your browser — nothing is uploaded, stored or logged.
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How it works
- 1 Paste your JavaScript.
- 2 The minified output appears live.
- 3 Copy or download the .js file.
Common use cases
- Quickly shrink a small script.
- Remove comments before sharing.
- Reduce inline script size.
- A fast, dependency-free first pass.
Frequently asked questions
Is my input sent to a server?
No. Everything runs locally in your browser — your input is never uploaded, stored or logged.
How thorough is the minification?
It is deliberately conservative: it removes comments and extra whitespace but does not rename variables or restructure code. For maximum compression, use a full bundler (esbuild, terser).
Could it break my code?
It preserves strings, template literals and regex literals and keeps line breaks to stay ASI-safe. Very unusual code could still differ — always test the output.
Is it really free?
Yes — free, with no signup and no limits.