JavaScript Minifier
Minify JavaScript with Terser: dead code removed, names shortened, whitespace gone.
Your result will appear here as soon as you add some input.
How to use it
- 1Paste your input into the input box, or type it directly.
- 2Adjust the options if you need something other than the defaults.
- 3The result updates as you type.
- 4Copy the result to your clipboard or download it as a file.
About the JavaScript Minifier
Terser parses the code, drops unreachable branches and debugger statements, shortens local names, and prints it back as compactly as it can. It is the minifier behind most modern build tools.
Name mangling only touches names that cannot be observed from outside, so exported and global names are left alone. If your code relies on `Function.prototype.name` or on reading its own source, check the result.
Questions people ask
Is your code uploaded to a server?
No. This tool runs entirely in your browser using standard web APIs, so your code never leaves your device. You can confirm it by opening your browser's network panel while the tool runs, or by disconnecting from the internet after the page has loaded.
Is it free, and do I need an account?
Yes, it is free, and there is no account, no sign-up and no watermark on the result. The project is funded by optional donations.