CSS Minifier
Result will appear here...About CSS Minifier
The CSS Minifier compresses stylesheet code by stripping comments, spaces, newlines, trailing semicolons, and redundant color codes, cutting CSS file size by up to 40% for faster first contentful paint (FCP).
How to Use CSS Minifier
Step 1
Paste your raw CSS stylesheet into the input box.
Step 2
View the minified CSS generated in real time.
Step 3
Inspect saved bandwidth metrics.
Step 4
Click "Copy Minified CSS".
Practical Use Cases for CSS Minifier
Website Performance & Core Web Vitals
Compress CSS stylesheets to reduce render-blocking resource size and improve Google PageSpeed Insights scores.
Inline Critical CSS Optimization
Minify critical above-the-fold CSS for inline injection into HTML <head> <style> tags to eliminate stylesheet network delays.
Input & Output Examples
Minifying CSS Rule Block
.button {\n background-color: #ffffff;\n padding: 12px 24px;\n border-radius: 8px;\n}.button{background-color:#fff;padding:12px 24px;border-radius:8px}Key Features & Performance
- ✓Removes all CSS comments (/* ... */), indentation, and line breaks.
- ✓Shortens hex color codes (e.g. #ffffff -> #fff) and strips leading zeros (e.g. 0.5em -> .5em).
- ✓Removes redundant trailing semicolons before closing braces (}).
- ✓Live compression savings meter (Original Bytes, Minified Bytes, % Saved).
- ✓100% Client-Side memory execution.
- ✓1-Click Copy minified CSS.
Key Terminology & Definitions
Render-Blocking Resource
A static resource (such as an external CSS stylesheet) that the web browser must download and parse before it can render page pixels to the screen.
First Contentful Paint (FCP)
A Core Web Vitals performance metric that measures the time from when the user initiates navigation to when the browser renders the first piece of DOM content.