Defaults.Exposed › Stats › TLS & certificates
What percent of websites use HSTS?
As of July 28, 2026 · census snapshot 2026-07-28
As of July 28, 2026, only 19.1% of the 210.4 million HTTPS-serving domains in the Defaults.Exposed census send a Strict-Transport-Security header — 40,232,423 domains, or 14.6% of all graded domains.
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Statistic current as of July 28, 2026. Recomputed from the live census each edition; the number on this page and the machine-readable twin always match. Please cite Defaults.Exposed and link this page.
Defaults.Exposed, "What percent of websites use HSTS?" (as of July 28, 2026). https://defaults.exposed/stats/what-percent-of-websites-use-hsts
Permalink:https://defaults.exposed/stats/what-percent-of-websites-use-hsts · Machine-readable:hsts-adoption.json · Licence:open data
Methodology: how we grade the internet · Source data: defaults.exposed/data. Updated with each census edition.