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 values requested by the form.
Actual output
A diagnostic result showing the checks performed and the findings that need review.
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
Use the final public URL, distinguish redirects from failures, and remember that authentication, JavaScript rendering or anti-bot controls can change what the checker can retrieve.
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 values requested by the form.
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 links found on a public page and review HTTP redirects, client errors, server errors and request failures.
- Security Headers Checker — Inspect important HTTP security headers and identify missing protection on a public page.