Free tool
Check a website in seconds.
SSL certificate expiry, domain expiry, HTTPS response, nameservers, and email records for any public website, however it is built.
Frequently asked questions
What does the site check look at?
Whether the site answers over HTTPS and how fast, when its SSL certificate expires and whether browsers trust it, when the domain registration expires, its nameservers and mail servers, and whether SPF and DMARC email records exist.
Is anything stored?
No. The check runs once when you ask and the result is shown only to you.
Why does it say unknown?
Some registries do not publish expiry dates, and some servers do not answer quickly. When a check cannot be completed, it says unknown rather than guessing.
How do I check all my client sites automatically?
StackOS watches every client site for uptime, SSL, domain expiry, DNS, malware listings, and speed, raises an incident when something breaks, and sends each client a monthly report.
Know before your client does.
Monitoring for every site you look after, with a monthly report your clients actually read.
25 web studios. Free during the beta.