How do I check when my SSL certificate expires?

Enter your domain above — the tool reads the public Certificate Transparency logs and shows the expiry date plus days remaining. No signup, no software to install. For a full security audit (ciphers, chain issues), use a dedicated TLS scanner; this tool answers the expiry question specifically.

What happens when an SSL certificate expires?

Browsers show a full-page "Your connection is not private" warning and most visitors leave immediately — it also hurts search rankings. Renew before expiry: most providers (including free ones like Let's Encrypt) support auto-renewal, which makes expiry a non-event.

How often should I check SSL expiry?

Check once after every renewal and set a calendar reminder 30 days before the next expiry. Better: enable auto-renewal with your certificate provider so you never have to think about it. This tool is handy for a quick spot-check of any domain, including ones you do not own.

Is this SSL checker accurate?

It reports exactly what the public Certificate Transparency logs contain — the real expiry dates of publicly logged certificates. What it cannot do: verify the live server is actually serving that certificate, or test TLS configuration quality. Think of it as an expiry lookup, not a security scan.

Can I check a subdomain's SSL certificate?

Yes — enter the full subdomain (like blog.example.com). Certificates are issued per hostname, so the bare domain and www can have different expiry dates. Check each hostname that serves HTTPS.

Why does the checker say no certificates found?

Either the domain has no publicly logged certificates (possible for very new or intranet-only certs), the domain name was mistyped, or the crt.sh service is temporarily unreachable. Double-check the spelling and try again in a few minutes.

SSL Expiry Checker

What is Ssl expiry checker?

SSL Expiry Checker — Free SSL expiry checker — look up any domain's certificate expiry date via public Certificate Transparency logs and see how many days of SSL coverage remain.

The tool fetches https://crt.sh/?q=<domain>&output=json — a free, keyless, browser-fetchable public API over Certificate Transparency logs — and takes the latest not_after (expiry) date among currently valid certificates. Days remaining = expiry − now. Status bands: ok (more than 30 days), expiring-soon (30 or fewer), expired (past). HONEST LIMITATION: this is a certificate expiry lookup, not a full TLS scan — it cannot test cipher suites, chain validity, or mixed-content issues, and it only sees publicly logged certificates. If crt.sh is unreachable, the tool reports the outage instead of guessing.

Why use this ssl expiry checker?

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Built for ssl expiry checker

Free SSL expiry checker — look up any domain's certificate expiry date via public Certificate Transparency logs and see how many days of SSL coverage remain.

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Transparent & honest

This is a certificate expiry lookup via public Certificate Transparency logs — not a full TLS scan (no cipher, chain, or mixed-content testing).

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Private by design

Everything runs in your browser. Your inputs never leave your device.

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Works everywhere

Fully responsive — perfect on desktop, tablet, and mobile. No app needed.

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Regularly updated

Regularly maintained and reviewed to ensure accuracy.

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Free forever

No accounts, no limits, no watermarks. Use SSL Expiry Checker as much as you need.

How to use SSL Expiry Checker

1Type a domain name (without https:// or paths), like example.com.
2Run the checker — it queries the public crt.sh Certificate Transparency database.
3Read the expiry date and days remaining for the domain's latest logged certificate.
4If status is expiring-soon (30 days or less), renew the certificate before it lapses.
5Re-check after renewing — new certificates appear in the transparency logs within hours.

What can you do with SSL Expiry Checker?

Check ssl certificate expiry — Free SSL expiry checker — look up any domain's certificate expiry date via public Certificate Transparency logs and see how many days of SSL coverage remain.
Ssl certificate checker — Free SSL expiry checker — look up any domain's certificate expiry date via public Certificate Transparency logs and see how many days of SSL coverage remain.
Certificate expiration date lookup — Free SSL expiry checker — look up any domain's certificate expiry date via public Certificate Transparency logs and see how many days of SSL coverage remain.
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When does my ssl expire — Free SSL expiry checker — look up any domain's certificate expiry date via public Certificate Transparency logs and see how many days of SSL coverage remain.

Good to know

This is a certificate expiry lookup via public Certificate Transparency logs — not a full TLS scan (no cipher, chain, or mixed-content testing).
Only publicly logged certificates are visible; the tool reports the latest not_after among currently valid certs.
Status bands: ok (>30 days), expiring-soon (≤30 days), expired (<0 days). If the crt.sh API is unreachable, the tool reports the outage honestly.

How it works

The tool fetches https://crt.sh/?q=<domain>&output=json — a free, keyless, browser-fetchable public API over Certificate Transparency logs — and takes the latest not_after (expiry) date among currently valid certificates. Days remaining = expiry − now. Status bands: ok (more than 30 days), expiring-soon (30 or fewer), expired (past). HONEST LIMITATION: this is a certificate expiry lookup, not a full TLS scan — it cannot test cipher suites, chain validity, or mixed-content issues, and it only sees publicly logged certificates. If crt.sh is unreachable, the tool reports the outage instead of guessing.

Examples

Healthy certificate

Status ok — the latest logged certificate expires well over 30 days out.

Subdomain with www

Enter the exact host you serve HTTPS on — certificates are issued per hostname.

Bare domain vs www

Subdomains often have separate certificates; check each hostname you use.

People also search for these — this tool handles them all:

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