JS minifier

Minify JavaScript only after it is tested

JavaScript minification removes formatting and may shorten safe expressions to reduce production file size. It is useful for small scripts and deployment checks when you retain the original source and can test the compressed output.

When this tool helps

  • Create a smaller delivery copy of a stable browser script.
  • Compare uncompressed and minified sizes during optimization.
  • Prepare a compact snippet for a controlled embed.

How to get a reliable result

  1. Run linting and functional tests on the readable source first.
  2. Minify the complete script and record the tool settings used.
  3. Test the result in every supported browser and keep source maps when debugging matters.

Practical example

Whitespace around operators can often be removed safely, while automatic renaming or reordering requires deeper semantic analysis.

Important note

Do not minify unknown code as a substitute for review. Dynamic property access, eval, licenses, and build-specific globals can make aggressive compression unsafe.