Free SSL
Certificate Checker
Instantly check any website's SSL certificate — issuer, validity dates, days until expiry, and which domains it covers.
Why SSL Certificates Matter
An SSL/TLS certificate encrypts traffic between a browser and a website, and proves the site's identity. Browsers flag sites without a valid certificate as "Not Secure" — hurting trust, conversions, and SEO rankings.
Certificates expire (typically every 90 days to 1 year) and must be renewed. An expired certificate breaks HTTPS entirely, often without warning until it's too late.
Common Use Cases
SSL Checker — FAQs
How often should I check my SSL certificate?
Set a reminder for 30 days before expiry. Most certificates auto-renew with services like Let's Encrypt, but it's worth verifying periodically — especially after server or hosting changes.
What happens when an SSL certificate expires?
Browsers show a full-page security warning and block visitors by default. This causes an immediate, severe drop in traffic and trust until it's renewed.
What's the difference between DV, OV, and EV certificates?
Domain Validation (DV) only verifies domain ownership. Organization Validation (OV) and Extended Validation (EV) also verify the business identity, showing more detail in some browsers.
Is a free SSL certificate (Let's Encrypt) good enough?
Yes, for most businesses. Let's Encrypt provides the same encryption strength as paid certificates — the difference is mainly in validation level and support, not security.
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