JavaScript Minifier
Compress JavaScript by removing comments and dead whitespace.
Runs entirely in your browser - your files are never uploaded
What is JavaScript Minifier?
JavaScript Minifier is a free, web-based utility designed for instant, local developer tools tasks. It allows users to compute, format, convert, or edit data directly in their browser without installing software or registering an account.
- 100% Free & Unlimited Usage
- 0% File Uploads (100% Client-Side Privacy)
- Instant Real-Time Calculations
- Mobile, Tablet & Desktop Compatible
How to use JavaScript Minifier
Select or Enter Input
Provide your source file or type your values into JavaScript Minifier.
Configure Settings
Adjust parameters, formatting options, or units in real-time.
Get Instant Output
Download the final processed file or copy the generated output.
About the JavaScript Minifier
Cut the transfer size of a script by removing line and block comments plus the whitespace between tokens. Strings, template literals and regular expressions are detected and protected so nothing inside them is altered.
This is a safe, non-mangling minifier: it never renames variables, so the output stays debuggable and works even with code that relies on function names. Everything runs locally in your browser.
Frequently asked questions
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