SSL Studio answers one question: is this domain’s certificate OK? Enter a domain and you get a straight verdict — Passed, Warning or Failed — an expiry countdown, and a plain-English explanation of anything that needs attention, with the next step spelled out.
Certificates guard every HTTPS connection, yet most tools that inspect them assume you already speak X.509. We built SSL Studio for the other audience first: the founder whose site suddenly shows a warning, the marketer asked “is our SSL expiring?”, the support agent triaging a customer report. Everything leads with what the result means and what to do about it.
The detail is never far away, though. Switch to Tech mode — the toggle in the header, or the “Verbose output” checkbox by the search — and the same check shows the full certificate chain, Subject Alternative Names, validity timestamps, serial number, signature algorithm, key type and size, and SHA-256 fingerprints, all copyable.
What the checker does
- Connects to your domain on port 443 and reads the certificate the server presents — the same view browsers get.
- Checks validity dates, hostname coverage (SAN and wildcard rules), chain completeness and trust.
- Flags weak keys and outdated signature algorithms before they become browser errors.
- Leads with an expiry countdown — and has a dedicated expiry checker when that is the whole question.
Checks run on demand and nothing you enter is stored — see the privacy policy for the full statement.
Part of DNS Studio
SSL Studio is one of six focused tools in the DNS Studio suite — one studio, six focused tools, each doing one job well:
- dns.studio — DNS records and propagation.
- dnssec.studio — DNSSEC signing and validation.
- dkim.studio — email signing records.
- bimi.studio — brand logo records for email.
- tls.studio — TLS versions, ciphers and protocol depth.
- ssl.studio — certificate status, expiry and browser-facing trust.
The split between the last two is deliberate: ssl.studio tells you whether the certificate is OK; tls.studio tells you whether the protocol configuration behind it is. If a result here points at protocol issues, we link you straight there.
Learn as you go
Every check links to short, plain-English articles — from what a certificate actually is to what that browser error means — so the tool leaves you a little more fluent each time, not just unblocked.
Questions or feedback? Contact us at security@ssl.studio.