JavaScript Minifier
Apply conservative whitespace and comment reduction to JavaScript.
Reduce JavaScript locally
This dependency-free tool performs conservative reduction rather than full parser-based minification.
Use a parser-based build tool for complex production bundles.
How to use the JavaScript Minifier
- Paste valid source code and retain an editable original copy.
- Minify the code and inspect the resulting size and output.
- Test the minified version in the target browser or build before deployment.
Practical example
Use a small known sample first so you can compare the output before processing a larger value.
What this tool cannot guarantee
The result reflects the supplied input and browser implementation; project-specific syntax and runtime behavior still require testing.
Continue this workflow with the JSON Formatter & Validator
Frequently asked questions
Is the JavaScript Minifier free to use?
Yes. It is available without an account or paid subscription.
Is my input uploaded or stored?
The core operation runs in your browser. Avoid pasting secrets into any web page unless the individual tool explicitly explains how the data is handled.
Should I review the result before using it?
Yes. Check the output for your project and test it in the intended environment before production use.