Wikipedia SSL certificate status

Valid — 44 days until expiry(wikipedia.org)

This page shows the Wikipedia SSL certificate as served by wikipedia.org, read from a live TLS handshake by an independent CertPost probe and rechecked hourly: expiry, issuer, hostname coverage, the full chain, and the negotiated protocol.

Last checked 2026-09-20 07:46 UTC. CertPost is not affiliated with Wikipedia.

Certificate details

Subject*.wikipedia.org

IssuerYE2

Valid from2026-08-05

Expires2026-11-03

Days remaining44

Chain validyes

Hostname matchyes

Negotiated protocolTLSv1.3

TLS versions acceptedTLSv1.2, TLSv1.3

Hostnames this certificate covers

*.m.mediawiki.org, *.m.wikibooks.org, *.m.wikidata.org, *.m.wikimedia.org, *.m.wikinews.org, *.m.wikipedia.org, *.m.wikiquote.org, *.m.wikisource.org, *.m.wikiversity.org, *.m.wikivoyage.org, *.m.wiktionary.org, *.mediawiki.org, *.planet.wikimedia.org, *.wikibooks.org, *.wikidata.org, *.wikifunctions.org, *.wikimedia.org, *.wikimediafoundation.org, *.wikinews.org, *.wikipedia.org, *.wikiquote.org, *.wikisource.org, *.wikiversity.org, *.wikivoyage.org, *.wiktionary.org, *.wmfusercontent.org, mediawiki.org, w.wiki, wikibooks.org, wikidata.org, wikifunctions.org, wikimedia.org, wikimediafoundation.org, wikinews.org, wikipedia.org, wikiquote.org, wikisource.org, wikiversity.org, wikivoyage.org, wiktionary.org, wmfusercontent.org

Certificate chain as served

*.wikipedia.orgissued by YE2 · expires 2026-11-03

YE2issued by Root YE · expires 2028-09-02

Root YEissued by ISRG Root X2 · expires 2032-09-02

ISRG Root X2issued by ISRG Root X1 · expires 2032-09-02

ISRG Root X1self-signed (root) · expires 2035-06-04

Common questions

Is the Wikipedia SSL certificate expired?

At the last check, the certificate wikipedia.org serves was within its validity period. It expires on 2026-11-03, 44 days from that check.

When does the Wikipedia SSL certificate expire?

The certificate wikipedia.org is currently serving expires on 2026-11-03 (44 days from the last check). Large services rotate certificates long before that date.

Who issued the Wikipedia SSL certificate?

The certificate was issued by YE2.

How is this checked?

A CertPost probe opens a real TLS connection to wikipedia.org on port 443 and reads the certificate the server presents, the same way a browser does. The result is cached and refreshed hourly.

Wikipedia rotates certificates without downtime. Your own domains are the ones that expire quietly — watch 3 free, no card.

Monitor your certificates

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