Element-Scoped View Transitions have shipped in Chrome 147! Call element.startViewTransition() to start a View Transition on a specific DOM subtree while keeping the rest of the page interactive. Perfect for building incredible, isolated micro-interactions → goo.gle/4gal7xc

Balancing advanced, engaging experiences with core web performance is a big challenge. In case you missed the latest announcements from #GoogleIO, new features like Modern Web Guidance, DevTools for agents, and HTML-in-Canvas are here to help make it easier.

Using canvas on the web usually means sacrificing browser features, but not anymore. The HTML-in-Canvas API lets you integrate real DOM elements directly into the canvas to build complex 3D web UIs that are fully inspectable, translatable, and accessible → goo.gle/4gal7xc

The WebMCP origin trial is available in Chrome 149 → goo.gle/4x97wMK By joining, you can integrate WebMCP for live testing, gather user feedback, and directly inform future iterations of the API.

Chrome 149 DevTools has shipped → goo.gle/4v55cVT Stay in your flow with these key updates: 💡 Agent walkthrough & Copy to coding agent in AI assistance 🎨 CSS Code Completion from Gemini in the Styles tab 🤖 WebMCP debugging tools in Application panel 🚀 DevTools for agents 1.0 with custom tools

We walked the floor at #GoogleIO and asked developers one simple question: What was your favorite part of I/O this year? 🎤

Chrome 149 has landed → goo.gle/4uSvj2a Say goodbye to hacky borders and pseudo-elements—you can now natively style container gaps using CSS gap decorations. Plus, active WebSockets will no longer block your pages from instantly restoring via the bfcache!

These might be the biggest changes to HTML in decades. Declarative Partial Updates let you render out-of-order HTML and build UI placeholders with zero JS. Combine it with the new streaming APIs to fetch and inject HTML directly into the DOM, simplifying Island architecture → goo.gle/49Bz9nK

✅ Nice lil btn scale-down 🙈 Layout change bc the scroll bar disappears 🙈 No light dismiss These UX problems can easily be solved with: - closedby="any" - overscroll-behavior: contain

Testing generative AI is difficult when one input leads to thousands of unpredictable answers. We published a guide on WebMCP evals to help you test LLM touchpoints. Verify that agents understand your schemas and can successfully complete full user journeys → goo.gle/4ftQUZI #GoogleIO

🛑 Stop letting your coding agent burn tokens guessing at performance fixes. With Chrome DevTools for agents, your AI can verify and automate fixes using real traces and agentic Lighthouse audits → goo.gle/4wVbLvc

AI coding tools are powerful at writing code, but they can't inspect execution in a live browser. The stable 1.0 release of Chrome DevTools for agents provides your AI assistant with the visibility it needs to verify, debug, and optimize code in real time → goo.gle/42K7Rrl #GoogleIO

Make your web application easy to understand for AI agents → goo.gle/3ReK3JD The latest Lighthouse update lets you audit how "readable" you site is for agents using deterministic audits: 🛡️ Programmatic element names 📐 Visual layout stability 📂 Machine-readable summaries #GoogleIO

My Google IO demo of HTML in Canvas and Web MCP github.com/PaulKinlan/3...

The Before: Fast-paced backstage code reviews and nerves 💻 The After: Pure relief, community questions, and coffee ☕️ #GoogleIO

At #GoogleIO, we shared our vision for a web where signing in isn't a chore. Authentication should be a secure entry point that actually makes users feel safe from the start. Our new guide will show you how to fix your account flows, eliminate friction, and protect your users → goo.gle/3Rd5TgI

I've been exploring what it takes to ship a prompt as an agent, and I think Chrome Extensions are a great way to do that. aifoc.us/shipping-a-p... Code: github.com/PaulKinlan/p...

Here's the recording of this year's “What's new in Web UI” talk @una.im and I gave at Google I/O earlier this week. youtu.be/uT7MVcCQ4rw Very happy with how it went, and I think you might find it useful, so give it a watch 😊 #ChromeDevRel #GoogleIO

The resources from my #GoogleIO talk "Build new features using built-in Al in Chrome": 👉 goo.gle/trailblazers (the trailblazers travel blog used as the running example during the talk) 👉 goo.gle/starter-exte... (the Eleventy blog template with editor you can use) 👉 goo.gle/built-in-ai-... (the docs)

@kulikowski.bsky.social 's I/O talk is a treasure trove to prepare your site for AI agents: 1. How agents 'see' your site, best practices to prepare, and developer tooling. 2. WebMCP deep dive with cool demos, Puppeteer & DevTools support. Watch: www.youtube.com/watch?v=HdCc... #AgenticWeb #WebMCP

Imagine if your AI coding partner actually understood Baseline. With the new Modern Web Guidance early preview, it can. We’ve packaged 100+ guides that prioritize modern implementations while always providing a fallback for features that aren't widely available yet → goo.gle/49Kt9sG

Manual runtime checks shouldn't bottleneck releases → goo.gle/4ww17L8 By integrating Chrome DevTools for agents into their workflow, CyberAgent successfully automated a complex and time-consuming debugging task. #GoogleIO

That’s a wrap on #GoogleIO! 🎬 ✨ Missed a moment or want to dive deeper? All sessions, including the full Developer Keynote, are now available to watch on-demand. Catch up on the latest in AI, Android, Chrome, and Cloud whenever, wherever you want. Watch now: goo.gle/IO2026VOD-5

Finding a hotel 'near Grandma' shouldn't require many manual clicks. At #GoogleIO, Expedia used WebMCP to expose structured tools directly to browser agents. See how the agent updated locations and navigated to checkout with native reliability.

AI agents can already write extension code, and now we're helping to level them up. At #GoogleIO, we launched the Chrome Extensions skill via Modern Web Guidance and Chrome DevTools for agents. Learn how to build extensions faster → goo.gle/4vllLfZ

WebMCP will enter the Origin Trial in Chrome 149, just a few weeks away. But you can try it today by enabling a Chrome flag! Want to now more? Check out the docs at developer.chrome.com/docs/ai/webmcp

The agentic era has arrived, but the foundation remains the same. Start with a human-centered approach, then layer on agentic tools to enhance your development and browsing flows ⬇️ #GoogleIO

We've been working on this for a while and it's exciting to see this available to test. There's a real issue with the knowledge in the models being frequently over a year old. It presents challenges for new platform features or new best practices to be implemented across the web.

LY Corporation used Chrome DevTools for agents to build a programmatic bridge to the browser → goo.gle/435qENO By automating their AI-based auditing system, they empowered every dev team to optimize effectively, reducing manual analysis by 98%. #GoogleIO

By giving your coding agent direct access to console logs, network traffic, and accessibility trees, it can verify and automate fixes without manual oversight. Watch the demo to see how it navigates a live UI to debug a signup flow in real time. #GoogleIO

Let your coding agent control and inspect a live browser using Chrome DevTools for agents. With the chrome-devtools-mcp package, equip coding agents like Antigravity CLI or Claude Code, with DevTools' capabilities to verify, debug, and optimize code in real time → goo.gle/4wmQhqO 🧵

Create engaging scrolly-telling experiences without sacrificing performance. Enter: Scroll-Triggered Animations, a new CSS feature that allows you to trigger animations when an element scrolls into view ⬇️ #GoogleIO

Start #GoogleIO day 2 off with the TL;DR from day 1 ↓

🛠️ Ultimately, WebMCP is about making a more secure agent pathway instead of scraping DOM and a11y trees. I made a small site to demo how it works, how agents use it, what the spec looks like, and some important links. It's interactive! You can use the extension to actuate the page:

Turn your website into an agentic toolkit 🌐 Catch the 3 big Chrome updates from #GoogleIO: 🛠️ WebMCP for agentic toolkits 🐞 Autonomous debugging via Chrome DevTools 📑 Modern Web Guidance Learn more: goo.gle/IO26-Chrome-...#GoogleIO

I'm nervous, but excited. Join me in 30 minutes live to learn about What's New in Chrome at #googleio - I'll be talking about WebMCP, DevTools for agents, Modern Web Guidance, HTML in Canvas and much more. www.youtube.com/live/cBS2bHh...

Redefine the web frontier with 15 major updates announced at #GoogleIO → goo.gle/4uMV8QI Bridge the gap between complex workflows and user experiences with features like WebMCP, HTML-in-Canvas, and built-in AI.

So here's an interesting little thing or 2 @nomster.bsky.social , @foolip.org , and myself have been cooking up—along with lots of help from others!: developer.chrome.com/blog/declara... This could lead to some VERY interesting changes in how we write web pages. Would love to hear your thoughts!

We are excited to announce that Chrome 149 introduces Immediate UI mode for passkeys and passwords. This new web capability streamlines user sign-in flows by enabling a low-friction experience for your users. Learn more at developer.chrome.com/blog/webauth...

The Prompt API is now in stable with Chrome 148. Use it with Gemini Nano to build web AI experiences with multimodal inputs and structured output for richer experiences. Plus, you'll now have access to expanded language support → goo.gle/43hL06y

At #GoogleIO, AI assistance in Chrome DevTools is now more powerful with access to Lighthouse audits and improved UI to understand reasoning. Collaborate with Gemini to resolve complex bugs faster and more confidently → goo.gle/4wB7jle

With the HTML-in-Canvas API announced at #GoogleIO, add DOM elements directly to your 3D environment, inheriting native support for screen readers, translation, and even autofill → goo.gle/3RQ8v49

Just announced 📢 Chrome DevTools for agents is now in stable. It brings powerful browser debugging, emulation, and Lighthouse audits to coding agents via an MCP server, CLI, and specialized agent skills→ goo.gle/4eHFzVI #GoogleIO

Announced at #GoogleIO: The WebMCP API will enter origin trial starting in Chrome 149 → goo.gle/4u57Wlf It's a proposed web standard transforming your site into an agentic toolkit by exposing structured tools, like JS functions and HTML forms, to browser-based agents.

Ensure your coding agents build modern, fast & secure apps by default → goo.gle/3PcqfGj We just announced Modern Web Guidance at #GoogleIO. It injects AI-ready skills and modern features—with Baseline Widely Available fallbacks—so your agent stays up to date 🧵

The #GoogleIO Developer Keynote is officially LIVE 🎪 Join us here ➡️ goo.gle/IO26-Develop...#GoogleIO

#GoogleIO has officially begun, and we hid our favorite offline companion in plain sight. Before we dive into the latest web platform updates, try and spot the Chrome Dino hidden in the crowd 👀

Our team is taking the #GoogleIO stage tomorrow to share some exciting platform updates → goo.gle/io2026reg-6#GoogleIO Join us as we break down the latest tools and features for the future of the web.

Down to the final hours. #GoogleIO → goo.gle/io2026-6#GoogleIO

Chrome 148 is rolling out → goo.gle/4eKQrSO Upgrade your web projects with new performance and UI features like CSS name-only container queries and media lazy loading. You also get direct access to on-device AI with the new Prompt API!