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 who specialize in web development topics such as accessibility, performance, design, and more.
Google I/O is on, and Baseline is part of the mix! Learn what's new in Baseline, Baseline tooling, as well as new content to help you adopt Baseline in your projects.
What's new in web All things Baseline
Discover resources created to help you understand and build performant, web-first experiences with AI.
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Interaction to Next Paint (INP) is now a Core Web Vital metrics. Start measuring and optimizing your site's INP.
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Read up on the latest features and best practices when it comes to identity and payment processing.
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The web platform is a constantly evolving ecosystem of browser features and APIs that developers can use to make websites that are easy and delightful to use. These pages are pathways for you to dive into each part of the web platform on web.dev—at your pace:
HTML is the document layer of the web, providing structure and semantics for pages.
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CSS is the presentation layer of the web, and allows you to your web pages look just like you want them to.
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JavaScript provides rich interactivity to web pages, allowing developers to build richly interactive websites that help users to perform tasks and accomplish goals.
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New to the web platform? We've got you covered! Dive into each part of the web platform with these courses curated specifically for beginners to HTML, CSS, and JavaScript.
Course
A solid overview of HTML for developers, from novice to expert level HTML.
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Course
A guide to CSS with modules covering everything from accessibility to z-index.
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An in-depth course on the basics of JavaScript.
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Our blog contains the latest news in web development, including new web platform features, updates to Baseline, AI, Core Web Vitals, and more. Keep up with the latest blog reading our blog.
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Baseline

Get up to speed with the latest updates and news on Baseline.
More on Baseline
Read about various happenings with Baseline during JUne 2025.
Thanks to JSON module scripts and import attributes, you can now directly import JSON in JavaScript modules. Both features are now Baseline Newly available.
Read about various happenings with Baseline during May 2025.
Announcing improvements to the Web Platform Dashboard.

CSS and UI design

Learn the latest tips and techniques to use in your work, right now.
Explore CSS
Adapt a font to your users' preferences, so they're maximally comfortable reading your content.
All major engines now support the new CSS color spaces and functions. Find out how they can bring vibrancy to your designs.
Improve web debugging experience with source maps.
Subgrid is now interoperable across all three major engines. Find out how to use it.

Core Web Vitals

Build faster websites and apps by understanding Core Web Vitals and other metrics.
Explore Core Web Vitals
A collection of best practices for optimizing websites' Core Web Vitals performance based on the state of the web.
Learn how to optimize for the Interaction to Next Paint metric.
Explore common misconceptions about optimizing Largest Contentful Paint by looking beyond image optimization and considering factors like Time to First Byte and resource load delay.
Guidance for collecting and reporting Web Vitals quickly and reliably.

Progressive Web Apps

Create capable web experiences.
More on PWA
A course that breaks down every aspect of modern progressive web app development.
Now that transform streams are supported in Safari, Firefox, and Chrome they are finally ready for prime time.
Dive into a fantastic collection of new patterns for amazing apps, including clipboard patterns, file patterns, and advanced app patterns.
On the Chrome Developers site, explore capabilities APIs.

Accessible for all

Learn how to make your sites more accessible for people with disabilities, whether permanent, temporary, or situational.
More on accessibility
Our new course is a great entry point and reference for accessibility topics.
An overview of three tools and techniques for testing and verifying accessible color contrast of your design.
This tutorial describes how to build an accessible main navigation of a website. You learn about semantic HTML, accessibility, and how using ARIA attributes can sometimes do more harm than good.
Read our interview with Melanie, a software engineer who specializes in digital accessibility.

Payments and identity

Find the latest techniques and best practices for payments and helping users safely log into your sites and apps.
More on identity
Passkeys make user accounts safer, simpler, easier to use.
Create a sign in experience that uses passkeys while still accommodating existing password users.
Learn more about Web Payments and how they work.
Maximize conversions by helping your users complete address and payment forms as quickly and easily as possible.

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