SSL Certificate Checker

Instantly analyze any domain's SSL certificate — expiry, issuer, SANs, and security posture.

Why SSL Matters for Canadian Businesses (PIPEDA)

Under Canada's Personal Information Protection and Electronic Documents Act (PIPEDA), businesses are required to implement strict security safeguards. Transmitting customer data (like passwords or credit cards) without a valid SSL certificate is not just a technical failure — it can be a direct violation of Canadian privacy laws. An expired or missing certificate puts your customers at risk and exposes your organization to regulatory consequences and reputational damage.

Comprehensive SSL/TLS Intelligence

Everything you need to assess the security posture and expiration timeline of your domain.

Expiration Monitoring

Calculate exact days remaining to plan your renewals before costly downtime or security warnings occur.

Deep Issuer Verification

Verify the Certificate Authority (CA) chain, including Let's Encrypt, DigiCert, Sectigo, and custom organizational issuers.

Multi-Domain & SANs

Automatically extract and validate all Subject Alternative Names (SANs) to ensure your wildcard and secondary domains are covered.

Encryption Algorithms

Inspect the underlying signature algorithms (like SHA-256) and public key encryption standards protecting your traffic.

Frequently Asked Questions

How do I check if my SSL certificate is valid?
Enter your domain name into our free SSL checker tool. It will query the server on port 443, extract the peer certificate, and instantly display the validity period, issuer, and days remaining.
What happens when an SSL certificate expires?
Browsers like Chrome and Safari will block users from accessing your site, displaying a massive "Your connection is not private" warning. This destroys user trust and completely halts e-commerce transactions.
What is a SAN in an SSL certificate?
A Subject Alternative Name (SAN) allows a single SSL certificate to secure multiple hostnames, subdomains, or even entirely different domains. Our tool automatically extracts and lists all SANs attached to a certificate.
Why does my website show 'Not Secure'?
This usually means your SSL certificate has expired, is self-signed, was issued for a different domain name, or your page is serving "mixed content" (loading HTTP assets on an HTTPS page).