handyman
Hazuu Tools

CSS Autoprefixer

Automatically add vendor prefixes (-webkit-, -moz-, -ms-) to your CSS for cross-browser compatibility.

Input CSS
Prefixed Output
Prefixed CSS will appear here...
info

About Autoprefixer

CSS vendor prefixes like -webkit-, -moz-, and -ms- are required by older browsers to support modern CSS properties such as flexbox, transforms, animations, and backdrop filters. Manually adding these prefixes is tedious, error-prone, and makes your stylesheets harder to maintain.

Our Autoprefixer tool automatically scans your CSS declarations and inserts the correct vendor-prefixed versions before each property that needs them. It also handles @keyframes duplication for WebKit browsers. Everything runs entirely in your browser with no server calls, keeping your code private and the workflow instant.

help

How to Use

01

Paste Your CSS

Copy your CSS code into the input editor on the left, or click "Sample" to load an example stylesheet with properties that need vendor prefixes.

02

Click Prefix

Hit the "Prefix" button to automatically add all necessary vendor prefixes. The stats bar will show how many prefixed properties were added.

03

Copy the Result

Use the copy button to grab your prefixed CSS and paste it into your project, ready for cross-browser compatibility.

quiz

Frequently Asked Questions

What is Autoprefixer? expand_more
Autoprefixer is a tool that automatically adds vendor prefixes (like -webkit-, -moz-, and -ms-) to CSS properties that require them for cross-browser compatibility. It saves you from manually tracking which properties need prefixes for older browsers.
Which CSS properties get prefixed? expand_more
The tool prefixes properties commonly requiring vendor support, including flexbox properties (flex, align-items, justify-content), transforms, transitions, animations, user-select, appearance, backdrop-filter, clip-path, hyphens, and more.
Is my CSS processed on a server? expand_more
No. All prefixing happens entirely in your browser using JavaScript. Your CSS code never leaves your machine, ensuring complete privacy and zero latency.
Does this tool handle @keyframes? expand_more
Yes. The tool automatically duplicates @keyframes blocks as @-webkit-keyframes to ensure animations work in WebKit-based browsers like older versions of Safari and Chrome.