1
Enter the hostname
Paste a domain or URL and the tool normalizes it to the live hostname before querying the certificate.
SSL certificate lookup
Free SSL Checker for instant certificate visibility
Inspect live SSL certificate details, expiration windows, issuers, and SAN coverage for any domain in seconds.
Run an SSL certificate check
Enter a domain or URL to fetch the active certificate details and understand how much time is left before renewal is required.
No signup required Instant live SSL check Works for any public domain
Certificate expiry visibility
See exactly when the active certificate expires before renewal work becomes urgent.
Issuer and subject clarity
Review who issued the certificate and which hostname the subject currently covers.
SAN coverage review
Confirm the expected domain and subdomains appear in the certificate SAN list.
Why SSL certificate checks matter
An SSL checker helps teams confirm whether a live certificate is trusted, current, and correctly issued for the hostname they expect users to visit.
That visibility matters when certificate renewals, SAN changes, issuer updates, or automation failures can silently introduce browser warnings before internal teams notice a problem.
By reviewing expiration timelines, subject details, and algorithm information in one place, teams can move faster when planning renewals or investigating trust-related incidents.
How the SSL checker works
The checker follows the same straightforward flow as the rest of the UptimeTick pages: enter a hostname, inspect live certificate metadata, and decide whether you need monitoring or renewal follow-up.
2
Review live certificate data
Read the validity period, issuer, subject, signature algorithm, and SAN entries returned by the certificate endpoint.
3
Take the next step
Use the result to plan renewals, verify certificate coverage, or move into automated SSL monitoring.
Choose a plan for proactive certificate monitoring
Move from manual SSL lookups to automated renewal visibility, fast alerts, and monitoring that stays alongside the rest of your uptime workflow.
Related tools
Explore adjacent checks that help teams protect certificate trust, renewal workflows, and service availability.
SSL monitoring
Move from manual lookups to recurring SSL expiration monitoring with automated alerts.
Open SSL monitoringDomain expiry monitoring
Track domain renewal deadlines next to certificate expiry to prevent avoidable outages.
Open domain expiry monitoringUptime monitoring
Combine certificate visibility with endpoint uptime checks for a broader reliability view.
Open uptime monitoringFrequently asked questions
Clear answers about certificate expiry checks, SAN coverage, and what to review when a certificate is close to expiring.