CSS Minifier
Compress CSS by removing whitespace and comments to reduce file size.
CSS Minifier compresses your stylesheet by stripping whitespace, comments, and unnecessary characters to produce a smaller file. It's free to use and needs no sign-up, so you can shrink your CSS in seconds. Web developers optimizing page speed and site owners chasing better Core Web Vitals scores rely on tools like this daily.
How does CSS Minifier work?
Every extra space, newline, and comment in a CSS file adds bytes that the browser has to download before it can render your page. This tool removes those characters and collapses redundant formatting without altering any selector or property value. The result is a leaner file that loads faster, especially over slower mobile connections.
How to use CSS Minifier
- Paste your unminified CSS code into the text box.
- Click minify to compress the stylesheet instantly.
- Copy or download the minified CSS and upload it to your server.
Key features
- Strips whitespace, line breaks, and comments to reduce file size.
- Processes CSS instantly in your browser with no upload wait.
- Keeps your original selectors and values fully intact.
- Free for unlimited use with no account needed.
Related tools
Reverse the process anytime with the CSS Beautifier, or minify other assets using the HTML Minifier and JavaScript Minifier.
Frequently asked questions
Is CSS Minifier free?
Yes, this tool is completely free and doesn't require creating an account. You can minify as many stylesheets as you like at no cost.
How much smaller will my CSS file get?
Savings vary depending on how much whitespace and how many comments your original file contains, so results differ from project to project. Heavily commented or loosely formatted stylesheets typically shrink more than code that was already tightly written.
Will minifying break my CSS?
No, minification only removes characters that don't affect rendering, such as extra spaces and comments. If something looks different afterward, check for a missing semicolon in the original file rather than blaming the tool.
Should I keep an unminified copy?
Yes, always keep your original, beautified CSS as the source file you edit going forward. Minify a fresh copy each time you deploy so debugging stays easy with the CSS Beautifier.
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