CSS / JS Minifier

Minify CSS or JavaScript to reduce file size.

A safe, lightweight minifier: removes comments and unnecessary whitespace. For JavaScript it preserves strings and avoids risky transformations, so it won't mangle your code — it just trims it.

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How to use CSS / JS Minifier

Three quick steps — no sign-up needed

  1. Step 1

    Paste your content

    Paste or type your text into CSS / JS Minifier — it runs in your browser.

  2. Step 2

    Run the tool

    Set any options and process instantly, with no uploads or waiting.

  3. Step 3

    Copy your output

    Copy the result to your clipboard, ready to use anywhere.

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About CSS / JS Minifier

CSS / JS Minifier is a free online tool that lets you minify css or javascript to reduce file size — straight from your browser, with no software to install, no sign-up, and no watermarks. It runs on Windows, Mac, Linux, Android, and iOS, so you can use it on whatever device you happen to have to hand.

CSS / JS Minifier is built to make developer tasks quick and painless, with a clean interface that anyone can use straight away. Files and data are processed securely and removed automatically afterwards, and many steps run entirely on your own device for extra privacy. Because CSS / JS Minifier is completely free and unlimited, you can use it as often as you need for work, study, or personal projects.

Benefits of CSS / JS Minifier

Smaller, faster files Strip comments and whitespace to shrink CSS and JS for quicker sites.
One-click copy Grab the minified output ready to paste into your project.
Runs locally Your code stays in your browser — nothing is uploaded.
Free & unlimited Minify as many files as you like.

Frequently asked questions

How do I use CSS / JS Minifier?

Open CSS / JS Minifier, follow the simple steps on the page, and get your result in seconds — everything happens online in your browser.

What can I use CSS / JS Minifier for?

Minify css or javascript to reduce file size for work, study or personal projects — CSS / JS Minifier is built to make developer tasks quick and painless.

Does CSS / JS Minifier work on mobile?

Yes. CSS / JS Minifier runs in any modern browser, so it works the same on phones, tablets and computers with nothing to install.