Developer Utilities · Free tool
JavaScript Minifier
Strips comments and collapses whitespace from JS. For production minification, use terser or esbuild.
Quick whitespace/comment minifier — strips // … and /* … */ comments, collapses spaces, trims around operators. For production-grade minification (variable mangling, dead-code elimination, AST-aware passes), use terser or esbuild. This tool typically saves 30–60% on hand-written code; minifiers like terser hit 70–85%.
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What it does
Quick whitespace + comment minifier for JavaScript snippets. Strips // and /* */ comments, collapses spaces, trims around operators. For production, use terser or esbuild.
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/javascript-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 JS.
- Read the minified version + size savings.
Frequently asked questions
- Why use terser instead?
- terser does AST-aware minification: variable mangling, dead-code elimination, constant folding. This tool does textual minification only — typically saves 30–60%; terser hits 70–85% on the same input.
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