Certificate Expiry Checker
Processing: API. Processed by cent-ai's API: sent to our server, held in memory, never stored.Enter a domain or paste a certificate to check its expiry, with clear severity levels and a recommendation. Nothing you enter here is stored or logged.
How to use it
- Enter a hostname (e.g.
example.com) or paste a PEM certificate. - Select “Check expiry” to run the check.
- Review the severity and days remaining.
Example
Select “Use example” above to load a sample domain.
Privacy and security
- Input is sent to our API only to run the check; it is never persisted or logged.
- For the domain path: private, loopback, link-local, and other reserved IP ranges are blocked.
- For the certificate path: parsing happens in memory, with no network access.
Limitations
- Does not (yet) support recurring/scheduled monitoring — this is a one-time, on-demand check.
- For the domain path, defaults to port 443.
FAQ
What are the severity thresholds?
Healthy: more than 60 days remaining. Watch: 30–60 days. Warning: 7–30 days. Critical: under 7 days. Expired: 0 days or fewer. These are documented, fixed thresholds, not scored against any external methodology.
Can I check a certificate file instead of a live domain?
Yes — paste a PEM-encoded certificate instead of a hostname and it's parsed directly, with no network connection made.