SSL Certificate Checker Online Free

Check your website’s SSL certificate online with our free SSL Certificate Checker. Review certificate validity, expiration dates, issuer information, and other available certificate details to help identify potential HTTPS configuration problems.

Whether you manage a business website, an online store, a blog, or a client website, checking your SSL certificate regularly can help you identify expiring certificates and troubleshoot common security configuration issues.

Enter your domain name into the checker above to inspect the SSL certificate presented by your website.

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SSL Certificate Checker

Inspect HTTPS certificate validity and expiry information.

Uses public DNS, RDAP registration data, or TLS certificate information where available. Domain Authority scores require a licensed data provider and are not estimated.
Daily limit: 3 request(s) per visitor. Remaining today: 3.

How to Check an SSL Certificate Online

Follow these steps to check the SSL certificate installed on your website:

  1. Enter your domain: Type your website’s domain name into the SSL checker.

  2. Start the check: Submit the domain to inspect the certificate presented by the server.

  3. Review certificate details: Check the validity dates, issuer, hostname coverage, and other information returned by the tool.

  4. Resolve any issues: If the certificate is expired, mismatched, or incorrectly configured, contact your hosting provider or administrator to investigate.

Monitor certificate expiration

TLS certificates have defined validity periods. If a certificate expires and is not renewed or replaced, browsers may display security warnings when visitors access your website.

Verify your website's HTTPS configuration

An SSL checker can help confirm whether a server presents a certificate for the requested hostname.

Identify certificate hostname mismatches

A certificate must cover the hostname visitors use to access your website. If the certificate does not include the requested domain, browsers may report a certificate name mismatch.

Check certificate issuer details

Certificate information can identify the issuing certificate authority and help you verify that the certificate matches your intended deployment.