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iplocatortools.com · Free Network Tools
◉ Security Tool

SSL Certificate Checker

Verify any domain's SSL/TLS certificate — issuer, expiry date, days remaining, and validity. Reads the live certificate directly.

Reads the live certificate directly — no https:// needed

SSL Certificate Basics

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What is SSL?
SSL/TLS encrypts data between browser and server. HTTPS requires a valid certificate from a trusted Certificate Authority.
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Certificate Expiry
Certs expire after 90 days (Let's Encrypt) to 1 year. Expired certs cause browser security warnings — monitor expiry dates.
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Certificate Authority
CAs like Let's Encrypt, DigiCert, and Cloudflare sign certificates. Browsers trust certificates from recognised CAs.
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SANs & Wildcards
One cert can cover multiple domains via SANs. A wildcard cert (*.example.com) covers all subdomains automatically.