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How to use JavaScript Minifier

Paste your JavaScript, and the tool strips whitespace and comments and shortens variable names to reduce the file size.

Frequently asked questions

What does JavaScript minification remove?

Minification removes unnecessary whitespace, line breaks, comments, and can shorten variable names. It creates the smallest valid JavaScript output.

How much size reduction can I expect?

Typical reduction is 20-40% depending on code style. Code with lots of comments and whitespace compresses more. The tool shows exact byte savings.

Is minified code still valid JavaScript?

Yes, minified code is fully valid and executes identically to formatted code. Only readability is affected—minified code is harder for humans to read.

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