Minify JavaScript in your browser: remove comments and whitespace, keep license banners, and preserve strings and regex — free, private, no signup or upload.
0 characters
100% browser-based
Runs locally in this tab
No upload required
Your files never leave this device
Nothing is stored
Close the tab and the input is gone
Instant results
No queue and no server wait
Paste readable source and get a denser script for a bookmarklet, a third-party snippet, or a file that skipped your bundler. Strings and regular expressions are preserved so a minify pass does not smash a regex slash or a quoted path.
Toggle preserve license comments if a header must remain in the shipped file. Ordinary comments still come out. That matches how many production minifiers treat legal banners.
See the byte savings on the same screen as the output. Useful when you are checking whether a comment block or pretty-printing was most of the weight.
Source stays in your browser. Unpublished features, API URLs in strings, and client scripts are not uploaded. No account required.
Drop a function, a snippet, or a small file into the input. You do not upload a .js file to a server.
Enable the option if a legal header must survive. Leave it off to strip every comment.
Original vs minified size and the reduction percentage tell you whether the pass did useful work.
Copy the output into your page or build. This is a whitespace/comment minifier, not a full terser with mangling — nothing is stored on a server.
Straight answers on privacy, limits, and how the workspace behaves.
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