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Efficiently minify CSS code and remove redundant characters to boost page load performance.
CSS Formatter & Beautifier
Format and beautify CSS code to improve readability and maintainability. Supports custom indentation rules.
PX to EM Converter
A pixel and EM unit converter for front-end developers featuring custom base font sizes and real-time two-way conversion.
PX to Percentage Converter
Convert pixel values to percentages based on root font size. Ideal for CSS responsive design and fluid layouts.
CSS Selector Tester
Verify CSS selector matches in HTML and quickly locate elements.
CSS Formatter & Beautifier
Format and beautify CSS code to improve readability and maintainability. Supports custom indentation rules.
PX to EM Converter
A pixel and EM unit converter for front-end developers featuring custom base font sizes and real-time two-way conversion.
PX to Percentage Converter
Convert pixel values to percentages based on root font size. Ideal for CSS responsive design and fluid layouts.
CSS Selector Tester
Verify CSS selector matches in HTML and quickly locate elements.
PX to REM Converter
A bidirectional PX to REM converter for front-end developers and designers, featuring customizable root font sizes.
Slow page load times are often caused by bloated CSS files. This tool minifies CSS by removing whitespace, comments, and other redundant characters. CSS minification is the process of reducing file size by stripping out unnecessary characters, outputting streamlined but functionally equivalent code.
How should I choose the optimization level?
The default Level 1 is suitable for most scenarios. Higher levels require compatibility testing.
What exactly does the Rebase feature do?
When the deployment location of a CSS file changes, it automatically corrects relative URL paths (e.g., url(../img/bg.png)) to prevent resource loading failures.
Ensure the input has valid CSS syntax. Minification is irreversible, so please back up your source files. If Rebase is enabled, verify your resource paths. Always perform compatibility testing before deploying to a production environment.
We recommend using a CSS validator to check syntax integrity after minification. Typical example: Inputting body { margin: 0; /* reset */ } will output body{margin:0}, achieving a 30% compression rate. For complex structures like media queries, Level 2 optimization is recommended.
