JS Minifier
Minify JavaScript (whitespace/comments basic).
About the JS Minifier
This JS Minifier reduces JavaScript size by stripping comments and unnecessary whitespace. It is aimed at small scripts and paste-in snippets where a full Webpack/esbuild pipeline is overkill — bookmarklets, tiny widgets, or quick demos.
It is a basic compressor, not a full mangler/transpiler. For large apps, prefer a real build tool that also bundles and tree-shakes.
Useful scenarios
- Compressing a short analytics or UI helper script
- Preparing a snippet for embedding in a CMS custom HTML block
- Teaching the difference between readable source and shipped bytes
How to use
- Paste JavaScript source into the input.
- Minify and verify the output still looks syntactically intact.
- Test the script in the browser before deploying.
Important limits
- Do not rely on this for TypeScript, JSX, or modern bundling — compile first.
- ASI edge cases and certain regex literals can be sensitive; always run the result.
- Keep unminified source in git for debugging production issues.
FAQ
Does this rename variables? No. It focuses on whitespace/comments, not aggressive mangling.
Will minifying hide bugs? No — it can only make stack traces harder to read. Use source maps in real apps.