ismydomainok
free check · no signup · nothing stored

Check your domain's SSL, DNS, and expiry

One scan tells you whether your domain resolves, whether its certificate is trusted, and how long you have before either one lapses. If something is broken, we tell you why — not just that it failed.

One input, one verdict — raw records are always one click down.

3
Checks per scan
1
Clear verdict
$0
Free, no signup
0
Data stored

What this domain checker tests

Three separate systems decide whether a domain is reachable, trusted, and still yours — and they fail independently, which is why a site can look fine in one place and broken in another. This checker tests all three in a single scan.

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DNS propagation check

Whether your domain resolves to the right server — and whether that answer has reached resolvers everywhere, or only yours.

Why it matters: if DNS hasn't propagated, some visitors can't reach your site at all.
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SSL certificate check

Whether your HTTPS certificate is valid and trusted, who issued it, which hostnames it covers, and when it expires.

Why it matters: an expired certificate shows every visitor a full-page security warning.
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Domain expiry check

When your registration lapses — the authoritative date from the registry, not the one your registrar's dashboard shows.

Why it matters: a lapsed domain can be bought by someone else — and is hard to recover.

Common domain, DNS, and SSL questions

Plain-language answers to what your results mean — and the reason behind each one.