Browser Compatibility Database

The most widely referenced browser feature support database in the web development ecosystem, providing real-time compatibility data for CSS properties, HTML elements, JavaScript APIs, and browser features across Chrome, Firefox, Safari, Edge, and their mobile counterparts. Each feature entry displays a visual support matrix with color-coded cells indicating full support, partial support, or no support across browser versions going back over a decade. The platform aggregates data from multiple authoritative sources including browser release notes, MDN documentation, and community-reported test results. Beyond simple support flags, entries include detailed notes on partial implementations, vendor prefixes required, known bugs, and alternative syntaxes for older browser versions. Global usage statistics from analytics data show what percentage of users have browsers supporting each feature, helping teams make informed decisions about progressive enhancement strategies. Developers can filter results by region to see adoption differences between countries, and track feature support trends over time with historical data charts. The search functionality supports fuzzy matching and aliases, so queries like gap, backdrop-filter, or popover return the correct feature instantly. The platform also offers an embeddable widget and a JSON API for integrating compatibility checks into build tools, linters, and documentation generators. With over 700 tracked features ranging from established specifications like Flexbox and Grid to cutting-edge proposals like CSS nesting and the popover API, it has become an indispensable reference for every web developer making cross-browser compatibility decisions.