Security verification
Confirm the certificate is valid and properly configured, so visitor data stays protected and the browser stays quiet.
SSL certificate checker
Check any site’s certificate validity, expiration date, issuer, and configuration grade. Instant results, no signup.
Why check your SSL certificate?
Expiration monitoring
Track the expiry date and prevent the security warning that arrives the morning a certificate lapses.
Certificate details
See the issuer, validity window, key size, and the TLS versions the server actually negotiates.
Reading the result
What the grade actually tells you.
What is an SSL certificate?
It encrypts data moving between a website and its visitors. It enables HTTPS, shows the padlock in browsers, and protects passwords and payment details.
Why does SSL matter for search?
Google uses HTTPS as a ranking signal, and browsers show security warnings on pages without it. The warning costs you more visitors than the ranking does.
What do the grades mean?
A+ to F. A or A+ is a strong configuration. B suggests minor improvements. C and below indicate real problems worth fixing this week.
How often should I check?
Monthly, and after any server change. Or add the domain to DomainGuard and let the schedule do it.
Keep this domain monitored
Stop checking. Start being told.
DomainGuard tracks certificate expiry, DNS records, DMARC and uptime for every domain you add, and emails you when something changes.