SSL Checker — Check SSL Certificate & Expiry (Free)

Free — no credit card. Sign in with Google (free) to keep checking and save your results; Lifetime unlocks the full lists.

What you get

Days left

Time until the certificate expires

Issuer & coverage

Who issued it and which names it covers

Chain

Every certificate up to the trusted root

Health score

Trust, protocol, redirect and HSTS checks

About the SSL Certificate Checker

An SSL/TLS certificate encrypts traffic between visitors and your site and proves the site is really yours. If it expires, doesn't cover the exact host name, or is missing an intermediate certificate, browsers show a full-page 'Not secure' warning and visitors leave.

Nuqti opens a real TLS connection, reads the certificate and its chain, checks trust, host name coverage, days left, protocol version, whether old TLS 1.0/1.1 is still accepted, the HTTP→HTTPS redirect and HSTS — then scores the setup.

How to use it

1Enter a domainLike example.com — no need for https://.
2Watch the check run liveEach step appears the moment it finishes — no waiting on a blank screen.
3Sign in free with GoogleSave your results and keep using every Nuqti tool on the free plan.

Frequently asked questions

How do I check when my SSL certificate expires?

Enter your domain — the days left and expiry date are the first numbers in the report. Free certificates last 90 days and should auto-renew.

Why does my site say 'Not secure' with a valid certificate?

Often the certificate doesn't cover that host (e.g. www vs bare domain), the chain is incomplete, or the page loads mixed http:// content.

What is a certificate chain?

Your certificate is signed by an intermediate, signed by a trusted root. Servers must send the intermediate; if not, some devices can't verify it.

Is TLS 1.3 required?

Not required, but faster and safer. TLS 1.2 is the minimum; 1.0/1.1 should be disabled.

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