Acutis SSL certificate checker
Enter a domain and see who issued its SSL/TLS certificate, when it expires, how many days are left, and which hostnames it covers — read straight from the public Certificate Transparency logs. No sign-up, runs in your browser.
How to read the result
- Days until expiry — green means more than 30 days left, amber means 8–30 (time to plan a renewal), red means 7 or fewer days — or already expired.
- Issuer / CA — the certificate authority that signed it (e.g. Let's Encrypt, DigiCert, Google Trust Services).
- Covered hostnames — the SANs the certificate is valid for. If the domain you entered isn't in this list, browsers will show a name-mismatch error.
- Certificate history — recent certs in the CT logs. Frequent reissues (e.g. every ~60–90 days) are normal for automated CAs like Let's Encrypt.
The certificate is valid — but is the site actually reachable from your machine?
A good cert doesn't help if DNS, your network, or your own computer is the thing in the way. Acutis Go runs the full check — network, DNS and your machine — in 60 seconds and tells you exactly where the problem is. Free.
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