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Game design, business and tools for modern web games.

Ready Player Web

Building games for the modern web.

Multiple Shifting Gears.

Progressive Web Apps in multi-origin sites

Challenges and workarounds for building Progressive Web Apps in multi-origin sites.

How Truebil made the web its channel of growth

A startup's story of building a best-in-class web experience.

A pile of photos.

How to install the Thumbor image CDN

Thumbor can be used for free to resize, compress, and transform images on-demand.

Third-party JavaScript performance

Find out how third-party JavaScript can affect performance and what you can do to keep it from slowing down your sites.

DJ mixer controls.

More capable form controls

With a new event, and custom elements APIs, participating in forms just got a lot easier.

Artist painting tools

Largest Contentful Paint

Making it easier to know when a page's important content has loaded.

Phone outline with loading image and assets

Native lazy-loading for the web

Browser-level native lazy-loading is finally here!

Adam's Creation by Michelangelo on Sistine Chapel ceiling

Establish network connections early to improve perceived page speed

Learn about rel=preconnect and rel=dns-prefetch resource hints and how to use them.

A view through a rain-covered foggy window.

Create OS-style backgrounds with backdrop-filter

Blurring and color shifting behind an element.

A photograph of a half-painted wall.

Keeping things fresh with stale-while-revalidate

An additional tool to help you balance immediacy and freshness when serving your web app.

Faster web navigation with predictive prefetching

Learn about predictive prefetching and how Guess.js implements it.

How OpenSooq increased engagement by investing in the web

Learn how a small team achieved big wins by creating a compelling marketplace PWA.

Silhouette photo of a mountain during nighttime, photo by Nathan Anderson on Unsplash.

Hello darkness, my old friend

Overhyped or necessity? Learn everything about dark mode and how to support it to the benefit of your users!

Top tips for web performance

Use srcset to automatically choose the right image size.

An illustration of a service worker interacting with a cache.

Bringing service workers to Google Search

The story of what shipped, how the impact was measured, and the tradeoffs that were made.

A globe with code overlaid

How we're bringing Google Earth to the web

Improving cross-browser access to Google Earth with WebAssembly.

A wooden spoon, full of salt.

Web components: the secret ingredient helping power the web

Web components at I/O 2019

Use Lighthouse for performance budgets

Aircraft instrument panel, photographer Arie Wubben via unsplash.com

The value of speed

Show stakeholders how site speed improvements can increase revenue.

Transfering money from a phone

Updates to the Web Payments APIs

Stay up to date on what's new in Web Payments.

Youtube application screenshot

How YouTube improved video performance with the Media Capabilities API

Ensuring buttery smooth video playback across all devices.

A man at a whiteboard draws a flow diagram depicting shopping cart abandonment.

How can performance improve conversion?

Optimize your site's performance and improve conversions.

An unstable stack of rocks on a beach

The Layout Instability API

Detect unexpected layout shifts in JavaScript.

A pile of gears.

Making JavaScript and Google Search work together

Get the latest updates and insights from Google I/O 2019.

Service workers lining up.

Service worker mindset

How to think when thinking about service workers.

A row of shopping carts.

What should you measure to improve performance?

Strategies to measure performance at each stage in the purchase funnel.

A description of the hero image for screen reader users.

Image policies for fast load times and more

Use optimized image policies to ensure your site is using the best performing images.

A flatlay photo of wrenches and screwdrivers.

Extract critical CSS

Learn how to improve render times with critical CSS technique.

An hourglass with sand pouring through it

Are long JavaScript tasks delaying your Time to Interactive?

Learn to diagnose costly work preventing user interaction.

Speedometer on a retro car

Speed at scale: what's new in web performance?

Learn about three new web performance launches from I/O 2019.

Introducing PROXX

A game of proximity, inspired by minesweeper.

SameSite cookies explained

Secure your site by learning how to explicitly mark your cross-site cookies.

A series of screens shows a phone camera scanning an image and generating a link.

Visual searching with the Web Perception Toolkit

Easy to use real-world interactivity.

Hands-on with Portals: seamless navigation on the Web

Learn how to build good navigation UX with the Portals API.

Image of laptop with mouse pointing to checkout button on a web page

How to report metrics and build a performance culture

Understand why performance matters when it comes to conversion.

A group of colorful hot air balloons launching into the sky.

web.dev at I/O 2019

New look. New docs. New blog!

Discover performance opportunities with Lighthouse

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