SSL certificate checker
Verify HTTPS certificate validity, expiration, issuer, and whether HSTS is reported - for any public domain. No sign-up required.
How it works
Three steps to your result.
Enter a domain
Type your site hostname or paste a full URL. We normalize it to a public domain (localhost and private IPs are blocked).
Run the check
Our server asks a certificate API to inspect TLS for that host: validity, dates, issuer, SANs, and HSTS signal.
Review the result
See whether the certificate is valid, when it expires, and who issued it. Use it as a quick health check before launch or renewals.
Frequently asked questions
Quick answers about this tool.
Do I need to sign up?
Is this a full security audit?
Why was my domain blocked?
Why “Too many requests”?
Good to know
Context and tips to get more out of this tool.
TLS health before launch
Expired certificates take down signup flows silently. This tool reports issuer, expiry, chain validity, and HSTS headers for any public hostname.
Part of a pre-launch checklist
Run SSL, favicon, sitemap, and meta tag checks in one sitting before a Product Hunt or Show HN day so technical basics do not undermine trust.
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Check robots.txt and sitemap.xml in one pass: crawl rules, Sitemap lines, and whether your default sitemap is declared.
See the real conversations behind this check
The moment you know your site, name, or profile is healthy, the next step is demand: find the people already discussing the problem you solve, ranked by buying intent.
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