Defaults.Exposed › Stats › TLS & certificates
How many websites use self-signed certificates?
As of July 28, 2026 · census snapshot 2026-07-28
As of July 28, 2026, 3,306,642 domains in the Defaults.Exposed census present a self-signed certificate — 1.6% of the 212.0 million domains presenting any certificate.
Raw-pass counts include roughly 1% re-scan duplicates; proportions are unaffected.
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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, "How many websites use self-signed certificates?" (as of July 28, 2026). https://defaults.exposed/stats/how-many-websites-use-self-signed-certificates
Permalink:https://defaults.exposed/stats/how-many-websites-use-self-signed-certificates · Machine-readable:self-signed-certs.json · Licence:open data
Methodology: how we grade the internet · Source data: defaults.exposed/data. Updated with each census edition.