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JS Minifier

Minify JavaScript for production by removing comments, extra whitespace, and blank lines.

About This Tool

Free JavaScript minifier online — reduce JS file size by removing whitespace, comments, and shortening variable names, without changing how the code executes. Smaller JavaScript bundles load faster, parse faster, and improve page performance scores. This tool is ideal for minifying small scripts, widget code, or snippets without setting up a full build pipeline. Paste your JavaScript, minify it, and copy the compressed output for production use. Front-end developers, WordPress theme developers, and anyone deploying vanilla JS scripts benefit from smaller file sizes — a 50KB script can become 20KB after minification, saving bandwidth and improving load times for mobile users on slow connections.

How to Use

  1. 1

    Paste your JavaScript

    Paste your JS code into the input field.

  2. 2

    Click Minify

    The tool compresses the JS by removing whitespace and comments.

  3. 3

    Copy the output

    Copy the minified JS for use in your project.

Frequently Asked Questions

Is minified JavaScript still readable?+
Not easily. Minification deliberately compresses the code to be unreadable to humans. If you need to read production JS, use a JS Beautifier or your browser's DevTools pretty-print feature.
Does it break async/await or ES6+ syntax?+
Basic whitespace removal does not affect modern JavaScript syntax. Full "terser-style" mangling (renaming variables) can occasionally cause issues with code that relies on function.name or with poorly structured code. Test minified output in your environment.

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