CSS Autoprefixer

What is a CSS Autoprefixer?

A CSS autoprefixer is a free online tool that automatically adds vendor prefixes to your CSS code, ensuring cross-browser compatibility. Modern CSS features often require vendor prefixes like -webkit-, -moz-, -ms-, and -o- to work correctly across different browsers. Writing these prefixes manually is time-consuming, error-prone, and hard to maintain.

Our online CSS autoprefixer processes your CSS instantly in your browser and adds only the necessary vendor prefixes based on your target browser preferences. All processing happens client-side, ensuring your code remains private and secure.

How to Use the CSS Autoprefixer

1. Paste your CSS - Copy your CSS code into the input editor
2. Select browser targets - Choose your preferred browser support level
3. Get prefixed CSS - The output appears automatically with all necessary vendor prefixes
4. Copy and use - Copy the prefixed CSS and use it in your project

Why Use a CSS Autoprefixer?

Modern CSS features often require vendor prefixes for older browsers. Writing these manually is time-consuming and error-prone. An autoprefixer solves these problems by automatically adding only the prefixes you need based on your target browsers.

• Saves time - No need to manually look up which properties need prefixes
• Reduces errors - Avoid missing or incorrect vendor prefixes
• Easy to maintain - Update browser targets instead of modifying CSS manually
• 100% client-side - Your CSS never leaves your browser

Common Vendor Prefixes

• -webkit- - For Chrome, Safari, newer versions of Opera, and Edge
• -moz- - For Firefox
• -ms- - For Internet Explorer and older Edge
• -o- - For older versions of Opera

Frequently Asked Questions