Stylesheets grow comments, indentation and friendly spacing as you develop, and all of it costs download time in production. This CSS minifier removes what browsers do not need and applies safe micro-optimisations — collapsing spaces, dropping the last semicolon in a block, shortening zero values and hex colours where valid — so your site loads the same styles from a smaller file.
Safe by Design
CSS has corners where careless compression changes meaning: spaces inside calc() expressions, strings and URLs that must stay verbatim, and hacks that rely on exact formatting. The minifier respects quoted strings and url() values, keeps required spaces around operators, and never renames your classes or properties — renaming is where minifiers cause real damage. What comes out is the same stylesheet, written tightly, and the tool reports the byte saving so you can see it was worth doing.
How to Minify CSS
- Paste your CSS into the input area.
- Decide whether comments should be removed or kept.
- Click minify and check the new size against the original.
- Copy the compressed CSS or download it as a .css file.
- Keep your original file as the editable source of truth.
Part of a Faster Site
- Preparing stylesheets for production and release builds.
- Shrinking theme and plugin CSS you cannot rebuild.
- Embedding critical CSS inline in a page head.
- Cutting weight from email and template styles.
Frequently Asked Questions
Will the minified CSS style my page differently?
It should not. The tool only removes redundancy and applies value-level shortcuts that the CSS specification treats as identical.
Does it merge or reorder my rules?
No. Rule order is preserved exactly, because reordering can change which styles win. The saving comes from formatting, not restructuring.
What savings are typical?
Hand-written CSS with comments commonly shrinks by 15 to 40 percent. Framework files that ship pre-minified will not change much.