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TLS expiry & grade

Fetch cert chain & days-to-expire; flag weak sig/hash; friendly renewal reminders.

Database connection unavailable. The app still works for live checks, but history/export/alerts will be disabled.

Check a host

We use SNI and support IPv4/IPv6. Max network timeout 15s.

Enter a host or URL to check its TLS certificate, chain status, and renewal window.

Recent history

No history yet. Checks will appear here.