How to use JavaScript Minifier
- Paste JavaScript function or module code.
- Minify and scan output for missing semicolon issues.
- Test in browser console before deploying.
- Keep readable source separately for maintenance.
Worked examples
Concrete numbers and cases you can check against the tool above.
Embed snippet
Minify a 2 KB accordion script for a static GitHub Pages site.
When to use JavaScript Minifier
Quick experiments and legacy pages benefit from smaller inline scripts without configuring Terser in a build chain.
Common use cases
- Shrink bookmarklet-style utilities.
- Embed config bootstrap scripts in static HTML.
- Compare gzip size after manual deduplication.
- Prepare code snippets for size-limited contests.
Inputs and outputs
- ECMAScript syntax supported by the minifier engine
- Single-line output
Privacy
This tool runs entirely in your browser. Your data never leaves your device — nothing is uploaded to our servers.
Frequently asked questions
- Is this the same as uglifying?
- Light minifiers may not mangle variable names; check options for mangle passes.
- Will TypeScript compile?
- Paste compiled JS; TS types are not valid in runtime minifiers.
- Can minification introduce bugs?
- ASI edge cases exist — always run tests after minifying.