SSL Certificate Expiry Checker
See when every certificate you manage expires. Paste up to 20 domains (with optional ports), and the checker connects to each one and lists days remaining, expiry date, issuer and trust status — soonest first — with CSV export.
Paste domains one per line and click Check. Our server performs a TLS handshake with each in parallel and reads the leaf certificate's expiry date, issuer and validity. Results are sorted with expired and soon-to-expire certificates at the top and colour-coded (under 14 days is urgent).
Instant Results
Live checks in seconds
Nothing Stored
No logs of what you check
No Sign-Up
Free, no credits or email
Suggest a Feature or Improvement for Certificate Expiry Checker
Need custom options, higher limits, or extra format support? Let our engineering team know!
How to use Certificate Expiry Checker
- 1Paste your domains, one per line.
- 2Click Check expiry dates.
- 3Renew anything under 30 days.
- 4Export to CSV for your records.
Why certificates still expire unexpectedly
Auto-renewal fails silently more often than you'd think: a DNS change breaks the ACME challenge, a server wasn't reloaded after renewal, or a forgotten subdomain uses a manually installed certificate. An expired certificate shows a full-page browser warning and breaks APIs.
With validity shrinking towards 47 days by 2029, checking regularly matters more every year.
Checking one domain in depth
For chain problems, TLS versions and HSTS, use the SSL Checker. To find subdomains you may have forgotten, use the Subdomain Finder.
Frequently Asked Questions
Can it monitor and alert me?
Not yet — it checks on demand. Bookmark it, or use your CA's or host's expiry notifications.
What do you do with the domains and URLs I check?
Our server performs the lookup once and returns the result to your browser. We don't store the addresses you check or build a history. Private and internal addresses are blocked.
Is it free? Do I need an account?
It's completely free with no sign-up and no daily credits.
Guides & Tutorials
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