Does it run my JavaScript?

No. It only reads and rewrites text.

Can comments be kept?

Yes. Toggle the keep comments option.

It reports common unclosed strings, comments, and brackets before minifying.

Developer Tools

Compress JavaScript locally, optionally keep comments, and download a .min.js file.

Source

Minified

Before

0 B

After

0 B

Saved

Keep comments

JavaScript Minifier compresses JavaScript text without running it.

Paste JavaScript, choose whether to keep comments, minify, then copy or download the .min.js file.

The browser walks through the source text, preserves strings and templates, removes safe whitespace, and never uses eval or Function.

JavaScript input stays on the page and is never executed or uploaded.

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