CSS Minifier
CSS Minifier
Minify CSS rules by removing comments and unnecessary spacing.
Result size
0chars
Live update on input changes.
File input
Choose a file
Click, drop, or paste from clipboard.
Options
0 option(s)
No additional options required.
More actions
Input: manual
Input: manualInputsText/FileManual input • Auto-updateWaiting
Your input is processed locally in your browser whenever possible. We do not store your data.
Flow
- Parse stylesheet declarations and rule blocks.
- Remove comments and collapse safe whitespace.
- Emit compact CSS output for delivery-size optimization.
Example
Worked example: minify button styles
- 1 Input CSS contains comments and spaced declarations.
- 2 Minifier strips comments and compacts declarations.
- 3 Output keeps selectors and values with reduced bytes.
Minified CSS is ready for size and delivery checks.
How
- Paste CSS source into the input panel.
- Run minify and inspect compact output.
- Copy minified CSS for embed or build tests.
Cases
- Reduce CSS payload size for static pages.
- Generate compact snippets for emails and embeds.
- Compare pre/post-minify output during build QA.
Avoid
- Assuming minifier fixes broken CSS syntax automatically.
- Comparing visual output without clearing cache.
- Losing readability when trying to debug minified source directly.
FAQ
Does css minifier send my input to a server?
No. CSS Minifier handles the input in your browser whenever possible, so routine conversions, previews, and copy actions stay on your device instead of being sent to Calctrove servers.
Does this tool run on my server?
No. CSS minification is processed locally in your browser.
Should I keep original CSS too?
Yes, keep source CSS for maintenance and use minified output only for distribution.
Switch
Switch12
No match.