HTTP Archive’s annual
state of the web report
Our mission is to combine the raw stats and trends of the HTTP Archive with the expertise of the web community. The Web Almanac is a comprehensive report on the state of the web, backed by real data and trusted web experts. The 2021 edition is comprised of 24 chapters spanning aspects of page content, user experience, publishing, and distribution.Start exploring
Adoption of cache headers continues to steadily grow as we learn to navigate the multitude of caching choices. Optimize pages not only for high-end devices but also for the next billion users that access your product from low-end devices.
The Web Almanac has been made possible by the hard work of the web community. 121 people have volunteered countless hours in the planning, research, writing and production phases of the 2021 Web Almanac.See the contributors
Unless otherwise noted, the metrics in all of the 24 chapters of the 2021 Web Almanac are sourced from the HTTP Archive dataset. HTTP Archive is a community-run project that has been tracking how the web is built since 2010. Using WebPageTest and Lighthouse under the hood, metadata about nearly 8.2 million websites are tested monthly and included in a public BigQuery database for analysis. The July 2021 dataset was used as the basis for the 2021 Web Almanac’s metrics. For more information, see the Methodology page.Learn about our Methodology