FreeNo signup, no email
Free SSL & AI-readiness tools
Run any of these against a domain and get an answer in seconds — no signup, no email. Each one reads the live site from outside, the same way a visitor or an answer engine does. When you want it watched on a schedule instead of checked by hand, that is what CertPost does.
SSL checkerThe served certificate, chain, hostname and grade.
SSL expiry checkerDays until expiry, on any TLS port.
SSL chain checkerFull chain and intermediate validation.
AI readiness checkerCan ChatGPT, Perplexity, Claude, Bing and Google cite your site?
Stop checking by hand
A tool tells you the state right now. CertPost watches the served certificate around the clock and warns you — by email or webhook — before it takes a site down. Three certificates free, forever.
Start monitoring free