Free SSL test

Free SSL test

Testing uptime is all about checking that there is the ability to make connection to your website or API endpoint. Get instant results on response times, HTTP status codes, and endpoint availability - all completely free.
SSL Monitoring
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Your site's security looks good right now, but a one-time test can’t protect your traffic down the road. Our free tier takes care of the regular SSL checkups for you, all for free!

Monitor Your SSL Certificates For Free

Everything you need to know about SSL certificates

Frequently Asked Questions

What is an SSL certificate?

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An SSL (Secure Sockets Layer) certificate is a digital certificate that authenticates a website's identity and enables an encrypted connection between a web server and a browser. When a site has a valid SSL certificate, its URL begins with HTTPS rather than HTTP, and browsers display a padlock icon. SSL certificates are issued by trusted Certificate Authorities (CAs) and contain information about the domain, the certificate owner, the issuing authority, and the expiry date.

Why does SSL matter for your website?

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SSL is essential for three reasons: security, trust, and SEO. It encrypts data in transit, protecting your users' passwords, payment details, and personal information from interception. It signals trustworthiness — browsers actively warn users when a site lacks HTTPS. And since 2014, Google has used HTTPS as a ranking signal, meaning sites without valid SSL certificates are at a disadvantage in search results. Any site handling user data or logins should treat SSL as non-negotiable.

What causes an SSL certificate to fail?

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SSL failures have several common causes: the certificate has expired and wasn't renewed in time, the certificate was issued for a different domain than the one being accessed (domain mismatch), the certificate chain is incomplete or incorrectly configured on the server, the certificate was issued by an untrusted or self-signed CA, or the server's SSL/TLS configuration uses outdated protocols like TLS 1.0 that modern browsers reject. Any of these will trigger browser security warnings that deter visitors.

How long do SSL certificates last?

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As of September 2020, SSL certificates are valid for a maximum of 398 days (approximately 13 months). Before this change, certificates could be issued for up to two years. Certificate Authorities are now moving towards even shorter lifespans — Google's Chrome Root Program has proposed a 90-day maximum validity period to encourage automation and reduce the risk of compromised certificates remaining in use. This makes automated SSL monitoring increasingly important for any production website.

What is an SSL certificate chain?

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An SSL certificate chain (also called a chain of trust) is the sequence of certificates that links your domain's certificate back to a trusted root Certificate Authority. It typically consists of three layers: your domain certificate, one or more intermediate certificates issued by the CA, and the root certificate that browsers inherently trust. If any link in this chain is missing or misconfigured on your server, browsers will display a security warning even if your domain certificate itself is valid.

What happens when an SSL certificate expires?

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When an SSL certificate expires, browsers immediately begin warning visitors that the connection is not secure. Chrome, Firefox, and Safari all display prominent red warning pages that most users will not click through. Beyond the visitor impact, an expired certificate can affect your search rankings as Google may flag the site as insecure. If you're running an e-commerce site or handling any sensitive data, an expired certificate can also constitute a compliance violation. Setting up proactive SSL expiry monitoring avoids this entirely.

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