Format, validate, minify, copy and download JS — fast & accessible.
You can paste JS or type. The validator uses a quick syntax check (Function()). Not a substitute for full linting.
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Intro
JavaScript Minifier is a compact web tool that lets you format (beautify), validate (quick syntax check), minify (strip comments and unnecessary whitespace), copy to clipboard and download your JavaScript code as a file. It's designed to be fast and accessible — ideal for quick workflow steps before pushing code or testing.
Why use JavaScript Minifier?
- Reduce file size for faster network delivery.
- Quickly check code syntax before running or bundling.
- Beautify code for better readability during review.
- Export a single minified script for embedding or distribution.
How to use JavaScript Minifier?
- Paste your JavaScript into the Input JavaScript area.
- Click Format to make the code readable (indentation & line breaks).
- Click Validate to run a quick syntax check (shows error details if any).
- Click Minify to strip comments & collapse whitespace — ready for production.
- Use Copy to copy the output or Download to save as a .js file.
Frequently Asked Questions
No — this tool performs a quick syntax check using JavaScript's Function constructor to catch syntax errors. For deeper style and best-practice checks use dedicated linters like ESLint.
Minifying can break code if it relies on source-code formatting quirks or if comments are used inside strings. Always test the minified output. This tool uses a conservative minifier (removes comments & trims whitespace) — not an advanced mangler/obfuscator.
No. This tool performs whitespace/comment removal and basic compression. Variable renaming (mangling) requires advanced tools like Terser or UglifyJS.
Tip: All controls are reachable by keyboard. Use Tab to navigate and Enter to activate buttons.
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