CSS Minifier
DeveloperMinify CSS by removing comments and collapsing whitespace, and compare size before and after. Free and private; everything runs in your browser.
- Before
- 0 B
- After
- 0 B
Output
Enter CSS to minify
What is a CSS Minifier?
A CSS Minifier removes everything a browser does not strictly need: comments and the whitespace around selectors, braces and semicolons. The result is the same stylesheet in a smaller file, which means faster loads. Comparing the before and after sizes shows exactly how much you saved.
What does minifying remove?
- Comments: every /* */ block is removed.
- Whitespace: spaces, tabs and newlines between syntax tokens are collapsed.
- Unneeded last semicolons and redundant spaces inside rules.
Is my data safe?
Yes. Minifying happens entirely in your browser; your CSS is never sent or stored. No signup or install is needed.
What CSS minifying removes
- Comments and long whitespace runs.
- Final semicolons before closing braces.
- Redundant units and leading zeros (0.5em → .5em).
- Unneeded spaces around colons, commas and braces.
When minification backfires
Minified output is unreadable for humans, so always keep the original source file under version control. Pair minification with a cache-friendly name (style.min.css?hash) so browsers fetch the new file once the content changes.
Frequently Asked Questions
What is CSS Minifier?
Minifies CSS code by stripping comments and redundant whitespace to shrink file size.
How do I use CSS Minifier?
Type or paste your data into the field on this page and press the button. The result is calculated instantly in your browser — nothing is uploaded.
Is CSS Minifier free?
Yes, CSS Minifier is completely free. No signup, no downloads and no usage limits.
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