Developer Utilities · Free tool
JavaScript Minifier
Shrink JS by stripping comments and whitespace fast in your browser—no accounts, just paste and minify instantly for free, with no sign-up.
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What it does
Paste some JavaScript, click Minify, get a smaller version — strips line and block comments, collapses whitespace, and tightens spaces around punctuation. Useful for trimming a snippet before pasting into an inline script tag or a config file. No code ever leaves your browser.
Caveat: this is a conservative regex-based minifier. It preserves quoted strings and template literals but won’t re-rename variables, shorten booleans, or fully parse regex literals. For production builds, use Terser — every modern bundler wraps it.
Embed this tool on your siteShow snippetHide
Paste this snippet into any page. Loads on-demand (lazy), no tracking scripts, and sized to most dashboards. Replace the height to fit your layout.
<iframe src="https://freetoolarena.com/embed/js-minifier" width="100%" height="720" frameborder="0" loading="lazy" title="JavaScript Minifier" style="border:1px solid #e2e8f0;border-radius:12px;max-width:720px;"></iframe>How to use it
- Paste your JavaScript into the textarea.
- Click Minify — output and saved bytes show below.
- Copy the minified version.
- For heavy regex-based code, verify the result still runs.
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Learn more
Guides about this topic
- Developers & Technical · GuideHow to minify JavaScriptMinify JavaScript to shrink bundles and speed up loads—compare Terser, esbuild, and SWC instantly. Get free source map and integration tips, no sign-up required.
- How-To & Life · GuideHow to format HTMLSet indentation rules, self-closing tags, and attribute order while keeping version control friendly. Free online guide with minification trade-offs in seconds.
- Using Our Tools · GuideHow to generate QR codesMake QR codes for URLs, WiFi, vCard, or text. Learn error correction and sizing, then generate your QR code online free with no sign-up in seconds.
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