What is an SSL certificate and why does it expire?

An SSL certificate is a digital credential that encrypts data transmitted between a user's browser and your website. Certificates expire for security reasons—Certificate Authorities (CAs) issue certificates with limited validity periods (typically 1-2 years) to ensure that security standards remain current and compromised certificates can be phased out. When a certificate expires, browsers will display security warnings, potentially blocking access to your site.

How far in advance should I renew my SSL certificate?

It's best practice to renew your SSL certificate at least 30 days before expiration. This buffer period allows time for the renewal process, certificate issuance, and deployment without risking accidental expiration. Many hosting providers and certificate authorities recommend checking certificate status monthly to ensure you never miss a renewal deadline.

Can I check SSL certificates for subdomains?

Yes, SSL Expiry Checker can verify certificates for subdomains. Wildcard certificates (*.example.com) cover all subdomains under a domain, while single-domain certificates only cover specific subdomains. Simply enter the subdomain URL (e.g., subdomain.example.com) to check its certificate status and expiration date.

What happens if my SSL certificate expires?

When an SSL certificate expires, browsers will display a security warning (typically a red warning page or padlock icon) when users try to access your website. This can cause users to abandon your site due to security concerns, harming traffic and reputation. Additionally, search engines may penalize expired SSL certificates in rankings. Immediately renewing the certificate restores normal functionality and trust indicators.

Is SSL Expiry Checker free to use?

Yes, SSL Expiry Checker is completely free to use with no registration required. You can check unlimited domains and receive instant results about certificate expiration dates, issuer details, and validity status. There are no hidden fees, premium features, or subscription requirements to access the tool's full functionality.

SSL Expiry Checker

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