JavaScript Minifier
Compress JavaScript by stripping comments and whitespace. Your code is processed locally and never uploaded anywhere.
Runs 100% in your browser — nothing is ever uploaded.
What is JS Minifier?
Minify JavaScript online: strip comments and whitespace, shorten your code and see size savings instantly. Free, no upload — code stays on your device. Paste your content, get an instant result, and copy or download the output with a single click. Free and unlimited, with no watermarks and no registration — all processing happens right in your browser, so nothing is ever sent to a server.
How to use JS Minifier
- Open JS Minifier — it loads instantly and needs no sign-up.
- Paste or type your input into the editor (or press Sample to try an example).
- Adjust the available options if needed and press the action button.
- Copy the result with one click or download it as a file.
Frequently asked questions
Is JS Minifier really free?
Yes — JS Minifier is 100% free with no limits, no watermarks and no registration. You can use it as often as you like, on as many files or inputs as you need.
Is my data safe when I use JS Minifier?
Absolutely. JS Minifier runs entirely in your browser using JavaScript — your input is processed on your own device and is never uploaded to any server.
Does JS Minifier work on mobile devices?
Yes. JS Minifier works in any modern browser on desktop, tablet and mobile (Chrome, Firefox, Safari, Edge) — there is no app to install.
Is my code uploaded to a server?
Never. Every CodeKit tool runs entirely in your browser with JavaScript. Your code is processed on your device and never touches a network — it even works offline once the page is loaded.
Are these tools really free?
Yes — 100% free, no sign-up, no limits, no watermarks. We keep the site running with minimal, non-intrusive ads.
Is there a file or size limit?
No hard limit. Because processing happens on your machine, the only constraint is your device’s memory. Files of several megabytes work fine.