SSL Certificate Checker
Check any domain's SSL/TLS certificate details — expiry date, certificate issuer, subject, Subject Alternative Names (SANs), and whether the certificate is currently valid. Get an alert if the certificate is expired or expiring within 30 days. No signup required.
Updated June 2026
- 1Enter the domain name
- 2Run the check
- 3Review the certificate details
🌐 API Integration Required
This tool needs a backend API to check external URLs. Options:
- Use a serverless function (Next.js API route)
- Integrate with RapidAPI URL checker APIs
- Use PageSpeed Insights API (for speed checker)
How to Use SSL Certificate Checker
- 1
Enter the domain name
Type the domain you want to inspect, without http:// or https://.
- 2
Run the check
Click 'Check' to fetch the site's SSL/TLS certificate.
- 3
Review the certificate details
See the issuer, expiration date, and overall validity status.
Frequently Asked Questions
What SSL certificate details does this tool show?▼
Does an expired SSL certificate affect SEO?▼
How far in advance should I renew my SSL certificate?▼
What is a Subject Alternative Name (SAN)?▼
Why would a valid certificate show as invalid?▼
How to use SSL Certificate Checker
- 1
Enter the domain name
Type the domain you want to inspect, without http:// or https://.
- 2
Run the check
Click 'Check' to fetch the site's SSL/TLS certificate.
- 3
Review the certificate details
See the issuer, expiration date, and overall validity status.
Frequently asked questions
Everything you need to know about ssl certificate checker.
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