2020

Web Almanac

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 2020 edition is comprised of 22 chapters spanning aspects of page content, user experience, publishing, and distribution.

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Featured Chapter

Caching

Caching provides a significant performance benefit by avoiding costly network requests. It helps both end users (they get their web pages quickly) and the companies serving web pages (reducing the load on their servers). Caching really is a win-win!

25.6%

HTTP responses with no caching information

21.4%

Responses that cannot be revalidated

21.3%

Sites that could save over 2 MB on repeat visits with better caching

Read the Caching chapter

Contributors

The Web Almanac has been made possible by the hard work of the web community. 129 people have volunteered countless hours in the planning, research, writing and production phases of the 2020 Web Almanac.

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Methodology

Websites Tested

7.5M

Data Processed

31.3 TB

Unless otherwise noted, the metrics in all of the 22 chapters of the 2020 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 over 7.5 million websites are tested monthly and included in a public BigQuery database for analysis. The August 2020 dataset was used as the basis for the 2020 Web Almanac’s metrics. For more information, see the Methodology page.

Learn about our Methodology