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JavaScript Minifier

Paste JavaScript and shrink it by stripping comments and whitespace. A fast, safe in-browser minifier — no accounts.

Updated April 2026
Simple whitespace/comment removal. Not safe for regex-heavy code — use a real tool like Terser for production builds.

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.

How to use it

  1. Paste your JavaScript into the textarea.
  2. Click Minify — output and saved bytes show below.
  3. Copy the minified version.
  4. For heavy regex-based code, verify the result still runs.