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Apply now to join our WebDev Insights Community. web.dev Baseline Stay organized with collections Save and categorize content based on your preferences. Baseline Web Platform Baseline brings clarity to information about browser support for web platform features. Baseline gives you clear information about which web platform features are ready to use in your projects today. When reading an article, or choosing a library for your project, if the features used are all part of Baseline, you can trust the level of browser compatibility. Who defines Baseline? Baseline was originated by the Chrome team and is now defined by the WebDX Community Group. How do things become Baseline? Baseline has two stages: Newly available: The feature is supported by all of the core browsers, and is therefore interoperable. Widely available: 30 months have passed since the newly interoperable date. The feature can be used by most sites without worrying about support. Prior to being Newly available, a feature has Limited availability when it's not yet supported across browsers. The core browser set Chrome (desktop and Android) Edge Firefox (desktop and Android) Safari (macOS and iOS) Baseline in action Baseline in action is a new series developed to help developers learn how to use Baseline features together to build better user experiences. Learn more Baseline and tooling As Baseline has matured, we've seen that more developers are beginning to integrate it into their development workflows. Learn about the latest tools to integrate Baseline, as well as resources you can use to build your own tools! The Baseline Features audit is now available in Lighthouse Learn which web features are used on a page—and their Baseline status—with the new Lighthouse Baseline features audit. Learn more Introducing Baseline Alerts Baseline Alerts have landed on the Web Platform Status dashboard. Learn how they can shorten the time between awareness of a web feature, and when you can adopt it. Learn more Effortlessly get Baseline target data with the updated Baseline Checker tool Get data to select your Baseline target with Google Analytics data—now faster and easier. Learn more Browserslist now supports Baseline Browserslist has added support for Baseline queries. Find out what that could mean for your developer workflow. Learn more Create Baseline tools with the web-features package Learn how to use the data in the web-features npm package to create your own Baseline tools! Learn more The Baseline Tooling Hackathon starts now! Want to make the web better for a chance to win cash prizes? Join the Baseline Tooling Hackathon! Learn more Baseline for CSS properties now in Chrome DevTools Baseline information is now available for CSS properties in the Elements panel of Chrome DevTools! Learn more How to use Baseline in your project Learn how to integrate Baseline into your project with this codelab. Learn more WebStatus.dev: Now with more data, deeper insights, and a clearer path to Baseline Announcing improvements to the Web Platform Dashboard. Learn more The Baseline Netlify extension has shipped The Baseline Netlify extension helps developers to understand which Baseline targets are best supported by users. Learn more in this post on how to use it! Learn more Visual Studio Code now supports Baseline Learn about the new Baseline support in VS Code. Learn more Use Baseline with Browserslist Add Baseline to your development linting and packaging tools with Baseline-specific queries now built into Browserslist. Learn more How to query the Web Platform Dashboard for Baseline tooling Learn about the Web Platform Dashboard and how you can query its HTTP API to help you build Baseline tools. Learn more Support for CSS and Baseline has shipped in ESLint You can now use ESLint to lint CSS and enforce usage of Baseline CSS features in your project! Learn more in this blog post. Learn more Baseline theory Adopting Baseline in your projects means there are some considerations you need to make. These materials will help you to answer the hard questions, from polyfilling, tooling, and more. How to choose your Baseline target Learn what Baseline targets are, how to choose one, and how it can help your development experience. Learn more How to think about Baseline and polyfills Knowing when to reach for a polyfill can be a hard decision, but using Baseline features can help you answer this question. Learn more in this guide! Learn more Case studies Read these case studies to learn how developers in the industry are adopting Baseline as a part of their work to simplify browser support criteria and adoption of interoperable web features. How Target.com used Baseline to modernize features Learn how Target adopted Baseline, and how it changed their awareness and adoption of interoperable web features. Learn more How Cybozu eliminated browser compatibility overhead with Baseline Read about how Cybozu, a groupware company in Japan, adopted Baseline to simplify their browser support criteria. Learn more Making Baseline actionable with real user data How RUMvision incorporated Baseline information with their RUM data. Learn more The Baseline monthly digest The Baseline monthly digest is a monthly newsletter that highlights what happened each month with Baseline, including new features, community updates, and anything else that fits! July 2026 Learn more June 2026 Learn more May 2026 Learn more April 2026 Learn more March 2026 Learn more February 2026 Learn more January 2026 Learn more December 2025 Learn more November 2025 Learn more October 2025 Learn more September 2025 Learn more August 2025 Learn more July 2025 Learn more June 2025 Learn more May 2025 Learn more April 2025 Learn more March 2025 Learn more February 2025 Learn more January 2025 Learn more Baseline targets When features become part of Baseline in a given year, they're grouped into a feature set—also known as Baseline targets. Here are just a few of the targets you can explore to see what features you can use today. Baseline 2026 2026 is the latest and currently developing feature set for Baseline. All items that become part of Baseline Newly available in 2026 can be referred to as Baseline 2026. Baseline 2026 features Baseline 2025 All items that become part of Baseline Newly available in 2025 can be referred to as Baseline 2025. Baseline 2025 features Baseline 2024 All items that become part of Baseline Newly available in 2024 can be referred to as Baseline 2024. We published a post at the end of 2024 to round up all the features that landed during the year. Baseline 2024 features Baseline 2023 All items that become part of Baseline Newly available in 2023 can be referred to as Baseline 2023. We published a post at the end of 2023 to round up all the features that landed during the year. Baseline 2023 features Size container queries Size container queries became Baseline Newly available in February 2023. :has() :has() became Baseline Newly available in December 2023. Subgrid Subgrid became Baseline Newly available in September 2023. CSS Nesting Nesting became Baseline Newly available in August 2023. HTML <search> element The <search> element became Baseline Newly available in October 2023. Responsive video Responsive video became Baseline Newly available in November 2023. The inert attribute The inert attribute became Baseline Newly available in April 2023. Constraint Validation API The Constraint Validation API became Baseline Newly available in March 2023. :user-valid and :user-invalid :user-valid and :user-invalid became Baseline Newly available in October 2023. Compression Streams Compression Streams became Baseline Newly available in May 2023. Declarative Shadow DOM The Declarative Shadow DOM became Baseline Newly available in February 2024. Popover Popover became Baseline Newly available in January 2025. Where to find Baseline MDN Check the Baseline status of a property on MDN. Find Baseline on MDN Can I Use Check Baseline status on Can I Use to see if a feature is ready for use. Visit Can I Use On your site? Use Baseline to clarify feature status in your articles and presentations. Show Baseline status web.dev web.dev We want to help you build beautiful, accessible, fast, and secure websites that work cross-browser, and for all of your users. This site is our home for content to help you on that journey, written by members of the Chrome team, and external experts. Contribute File a bug See open issues Related Content Chrome for Developers Chromium updates Case studies Podcasts & shows Follow @ChromiumDev on X YouTube Chrome for Developers on LinkedIn RSS Terms Privacy Manage cookies English Deutsch Español – América Latina Français Indonesia Italiano Polski Português – Brasil Tiếng Việt Türkçe Русский עברית العربيّة فارسی हिंदी বাংলা ภาษาไทย 中文 – 简体 中文 – 繁體 日本語 한국어