JavaScript Formatter / Minifier
Input JavaScript
Formatted Output
About JavaScript Formatter / Minifier
Format and minify JavaScript for readability and optimization. If code includes markup or styles, refine them with the HTML Formatter and CSS Formatter.
Great for reviewing code, sharing snippets and reducing bundle size. For encoded payloads in URLs or Base64, decode first via the URL Encoder/Decoder or Base64 Encoder/Decoder.
Common Use Cases
- Code review and learning
- Optimize and reduce bundle size
- Share clean JS snippets
- Study generated/minified code
How It Works
- Formatting powered by Prettier (babel parser)
- Minification powered by Terser (compress & mangle)
- Warns when input is not valid JavaScript
- One‑click copy
FAQ
Will minify change behavior?
Minify removes whitespace and renames locals; behavior remains unless relying on whitespace. When sharing snippets, also pretty‑print JSON with the JSON Formatter.
ESNext supported?
Yes, modern syntax supported by Prettier and Terser.
Source maps?
Not generated in this tool; use your build pipeline.
Is data uploaded?
No, runs locally in your browser.