JavaScript Minifier

Minify JavaScript by removing comments and unnecessary whitespace for faster page loads.

Free JavaScript minifier. Strip comments and excess whitespace to ship smaller JS files. For production, use Terser or esbuild for full optimization.

Pourquoi les utilisateurs emploient cet outil

JavaScript Minifier strips comments and unnecessary whitespace from JS code. It is best used for small snippets, inline scripts, and quick exports — for production builds, prefer a syntax-aware minifier such as Terser or esbuild.

Compress small inline scripts before pasting into a CMS or HTML page.
Quickly trim a tracking snippet or analytics include.
Reduce the size of a one-off utility file you cannot run a bundler on.

Comment l’utiliser

1Paste your JavaScript into the input area.
2Compare the original and minified character counts.
3Copy the minified output.

Best practices

For real production builds, use Terser or esbuild — they understand JS syntax and rename variables safely.
Always keep the original source in version control.
Run the minified output in a browser to confirm it still executes.
Combine with gzip or brotli at the server for maximum savings.

Common mistakes to avoid

Do not use this tool to minify code that depends on multi-line strings or template literals containing line breaks.
Do not skip testing — whitespace-only minification cannot detect logic regressions.
Do not ship this output as a substitute for a proper build pipeline on large apps.
Do not paste secrets — even though processing happens locally.

FAQ

Réponses utiles

Is this a full minifier like Terser?

No. This tool strips comments and whitespace only. For variable renaming and dead-code elimination, use Terser or esbuild.

Will it break my code?

For most code it will not, but always test the minified output. Code that relies on whitespace or specific newline handling can break.

Is anything uploaded?

No. Minification runs entirely in your browser.