Steam SSL certificate status

Expiring soon — 22 days left(steampowered.com)

This page shows the Steam SSL certificate as served by steampowered.com, 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 Steam.

Certificate details

Subjectsteamcommunity.com

IssuerYR1

Valid from2026-07-14

Expires2026-10-12

Days remaining22

Chain validyes

Hostname matchyes

Negotiated protocolTLSv1.3

TLS versions acceptedTLSv1.2, TLSv1.3

Hostnames this certificate covers

aperturescience.com, community.steam-api.com, counter-strike.net, dayofdefeat.com, forums.l4d.com, half-life.com, half-life2.com, help.steampowered.com, l4d.com, learnwithportals.com, midnight-riders.com, orange.half-life2.com, s.team, source.l4d.com, sourcefilmmaker.com, steam-chat.com, steam.tv, steamcommunity.com, steamdevdays.com, steamgames.com, steampowered.com, steamvr.com, store.counter-strike.net, store.steampowered.com, store.teamfortress.com, storefront.steampowered.com, teamfortress.com, thinkwithportals.com, underlords.com, valvesoftware.com, www.aperturescience.com, www.counter-strike.net, www.dayofdefeat.com, www.half-life.com, www.half-life2.com, www.l4d.com, www.learnwithportals.com, www.midnight-riders.com, www.sourcefilmmaker.com, www.steamcommunity.com, www.steamdevdays.com, www.steamgames.com, www.steampowered.com, www.steamvr.com, www.teamfortress.com, www.thinkwithportals.com, www.underlords.com, www.valvesoftware.com

Certificate chain as served

steamcommunity.comissued by YR1 · expires 2026-10-12

YR1issued by Root YR · expires 2028-09-02

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

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

Common questions

Is the Steam SSL certificate expired?

At the last check, the certificate steampowered.com serves was within its validity period. It expires on 2026-10-12, 22 days from that check.

When does the Steam SSL certificate expire?

The certificate steampowered.com is currently serving expires on 2026-10-12 (22 days from the last check). Large services rotate certificates long before that date.

Who issued the Steam SSL certificate?

The certificate was issued by YR1.

How is this checked?

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

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

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