How to use it
- Enter up to ten domains, one per line.
- Solve the displayed math CAPTCHA.
- Select Check to start the sequential certificate lookups.
- Review the status and certificate fields for each domain.
- Copy the combined bulk results if you need a report.
The server disables peer and hostname verification, and the browser fallback uses certificate-transparency issuance data rather than the live deployed certificate.
What is the purpose of the tool
This checker helps administrators review certificate identity and date fields for a small group of HTTPS hostnames.
It reports an active-certificate badge per item but does not calculate a security grade, trust-chain result, or hostname-match verdict.
What parameters it generates in output
Bulk Results gives the submitted-item count and a named section per line. Target Evaluated shows the cleaned hostname. The certificate badge reports active or unavailable, and an error alert explains a failed lookup.
Issuer / CA names the issuer. Subject Common Name shows the subject. Valid From and Valid Until show certificate dates. Days Remaining is calculated from the expiry text. Subject Alternative Names (SAN) lists the returned SAN text.
FAQs related to that specific tool
How many domains can be checked?
The shared bulk interface accepts up to ten non-empty lines.
Are domains scanned at the same time?
No. The bulk handler processes them sequentially.
Does Valid Active Certificate prove trust?
No. The server does not verify the peer or hostname.
What does the browser fallback use?
It uses public certificate-transparency issuance data when the local endpoint is unavailable.
Is a security grade generated?
No. The page shows a certificate status badge and detail fields only.
Can transparency data differ from the deployed certificate?
Yes. Logged issuance records do not prove which certificate the server currently presents.