How to use SSL Certificate Checker
Enter a public HTTPS website and run the check to review certificate validity, issuer, subject and expiry information.
What the tool does
Check a public website certificate, issuer, validity dates, hostname and remaining days.
Supported inputs
The public URL, domain or metadata fields shown in the form. Public URL checks can only inspect resources the ToolTapGo server can reach.
Actual output
A diagnostic report that explains observed findings without silently changing the source.
Privacy and processing
Public-site checks may be handled by the ToolTapGo server so the requested public resource can be retrieved.
Limitations
The check runs through your PHP server and requires the OpenSSL extension and outbound HTTPS access.
Common mistakes
Check that the selected input type, units and output format match the task. Do not discard the source before opening the result, and do not treat a preview, estimate or converted file as verified until you have reviewed it.
Frequently asked questions
What can I use SSL Certificate Checker for?
Check a public website certificate, issuer, validity dates, hostname and remaining days.
What input does SSL Certificate Checker accept?
The public URL, domain or metadata fields shown in the form. Public URL checks can only inspect resources the ToolTapGo server can reach.
What should I check after using SSL Certificate Checker?
The check runs through your PHP server and requires the OpenSSL extension and outbound HTTPS access.
Related tasks and guides
- Website SEO Audit — Check page titles, headings, metadata and key on-page SEO signals for a public URL.
- Redirect Checker — Follow HTTP redirects and display each status code and destination.
- Broken Link Checker — Check a limited set of page links and report failed HTTP responses.
- Security Headers Checker — Inspect important HTTP security headers and identify missing protection on a public page.