CSS Feature Availability Matrix

Comprehensive CSS feature matrix covering all major CSS specifications from CSS1 to modern CSS4 modules. Explore layout systems like Flexbox and Grid, modern features like Container Queries and :has() selector, Custom Properties, animations, and more. Features detailed browser compatibility for Chrome, Firefox, Safari, Edge with fallback strategies. Perfect for CSS planning, learning modern features, and ensuring cross-browser compatibility.

CSS1-CSS4 Modules Browser Support Fallback Strategies Code Examples

Quick Examples

FLEXBOX: display: flex
GRID: display: grid
CONTAINER: @container queries

Filter Features

Feature Category

CSS Specification Range

Show Browser Compatibility

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Browser Support Filter

Target Browsers

Chrome

Firefox

Safari

Edge

Minimum Browser Versions

CSS Modernization

Current CSS Level

Target CSS Level

Legend

✓ Full Support

NEW Newly Supported

PARTIAL Partial Support

PREFIX Vendor Prefix Required

× Not Supported

FALLBACK Fallback Available

CSS Feature Matrix

Browser Compatibility Results

CSS Modernization Plan

CSS Feature Details

Export Matrix

Help & Related Tools

Everything you need to know

FAQ Frequently Asked Questions

What CSS features and browser compatibility does this matrix cover?

The matrix covers CSS1 through modern CSS with features like Flexbox, Grid, Container Queries, :has() selector, Custom Properties, animations, and more. Includes comprehensive browser support for Chrome, Firefox, Safari, Edge with fallback strategies for older browsers.

How do I use this tool for CSS modernization planning?

Select your current CSS level and target specification, then generate a modernization plan. The tool shows new layout capabilities, modern selectors, responsive features, and provides step-by-step guidance with fallback strategies for cross-browser compatibility.

Which browsers and CSS specifications are supported?

The matrix supports all major browsers (Chrome, Firefox, Safari, Edge) with specific version requirements. Covers CSS1, CSS2, CSS3, CSS4, and modern CSS specifications including layout modules, selectors level 4, and cutting-edge features.

How accurate is the CSS browser compatibility information?

Browser support data is based on official W3C specifications, MDN documentation, and Can I Use database. Each feature includes specific browser version requirements, fallback strategies, and performance considerations for production use.

Can I export CSS compatibility data and modernization plans?

Yes! Export options include HTML tables for documentation, CSV data for analysis, JSON for integration, copyable text matrices, and detailed browser compatibility reports with fallback strategies. Perfect for team planning and CSS architecture decisions.