SSL Check API — Verify SSL/TLS Certificate Validity for Any Domain
Check SSL/TLS certificate validity for any domain. Verify expiration dates, issuer, and certificate chain. Free API.
What is SSL Checking?
SSL checking connects to a domain and inspects its SSL/TLS certificate to verify validity, check expiration dates, identify the issuer, and validate the certificate chain. The API reports days until expiration, certificate subject and issuer details, and whether the certificate is currently valid.
How to Use It
Call GET /api/v1/ssl-check?host=google.com. Returns { host: string, valid: boolean, issuer: string, subject: string, valid_from: string, valid_to: string, days_remaining: number, error: string | null }.
Try it live
Test this endpoint in the interactive console
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Frequently Asked Questions
Does it check certificate revocation?
No. The API checks certificate validity, expiration, and chain but not CRL or OCSP revocation status.