Autoprefixer | Add CSS Vendor Prefixes Automatically
Add vendor prefixes (-webkit-, -moz-, -ms-, -o-) to CSS rules automatically using Can I Use browser compatibility data. Supports flexbox, grid, transitions, and modern CSS features. Fast, private, and runs entirely in your browser.
How to Use This Tool
- 1
Paste or type your CSS code into the input area.
- 2
The tool automatically adds necessary vendor prefixes based on browser compatibility.
- 3
Copy the prefixed CSS or download it as a .css file.
- 4
Use the prefixed CSS in your projects for better cross-browser support.
Use Cases & Examples
Cross-Browser CSS Compatibility
Ensure CSS works across all browsers by adding vendor prefixes for flexbox, grid, and other modern features.
Legacy Browser Support
Add -webkit-, -moz-, -ms- prefixes to support older browser versions automatically.
Build Tool Integration
Test and verify autoprefixer output before integrating into your build pipeline (Webpack, Gulp, etc.).
Quick CSS Fixes
Quickly add missing vendor prefixes to existing CSS without setting up build tools.
How Autoprefixer Works
Uses Can I Use database to determine which vendor prefixes are needed based on browser support.
Automatically adds -webkit-, -moz-, -ms-, -o- prefixes only where necessary.
Supports modern CSS features: flexbox, grid, transitions, transforms, gradients, and more.
Follows PostCSS Autoprefixer rules for accurate and minimal prefix addition.
Frequently Asked Questions
Q.What vendor prefixes does this tool add?
A. The tool adds -webkit- (Chrome, Safari), -moz- (Firefox), -ms- (IE, Edge), and -o- (Opera) prefixes based on browser compatibility requirements from Can I Use data.
Q.Does this work with modern CSS features like Grid and Flexbox?
A. Yes. The tool fully supports CSS Grid, Flexbox, transitions, transforms, gradients, and other modern CSS features that require vendor prefixes.
Q.Will it add unnecessary prefixes?
A. No. The tool only adds prefixes that are actually needed based on current browser support data, keeping your CSS clean and minimal.
Q.Can I use this instead of PostCSS Autoprefixer?
A. This tool uses the same Autoprefixer library. It's perfect for quick fixes and testing, but for production builds, integrate Autoprefixer into your build process.
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