JavaScript Minifier
Minify JavaScript with Terser.
Paste JavaScript and get a minified version using Terser — whitespace and comments removed and names shortened where safe. See the size you save. Everything runs in your browser.
Runs entirely in your browser — nothing is uploaded.
How to use the javascript minifier
- 1Paste your JavaScript.
- 2See the minified output and size saved.
- 3Copy or download the result.
Frequently asked questions
Is my code uploaded?
No — minification runs entirely in your browser with the Terser library; your code never leaves your device.
What if my JS has a syntax error?
Terser reports it — fix the syntax and the minified output appears automatically.
Read the guide
How to Minify CSS, JavaScript, and HTML (Free)