SSL Certificate Monitoring

SSL certificate failures block trust before visitors can use the page. NorthDuty checks SSL as part of every website health run.

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Never get caught by a surprise certificate expiry again.

Why SSL expiry creates avoidable incidents

An expired or invalid certificate can trigger browser warnings, failed checkouts, inaccessible login pages, and wasted campaign traffic.

Because SSL is part of reachability and trust, it belongs in the same monitoring timeline as uptime, DNS, redirects, page rendering, resources, JavaScript, and API calls.

How NorthDuty monitors SSL

Each website health check records whether the certificate is valid, issuer details where available, validity dates, and days until expiry.

Teams can create an SSL expiry alert rule with a threshold in days. When the latest health run crosses that threshold, NorthDuty sends alert email to configured email destinations.

The health check runs every 5 minutes by default and can be configured per project.

SSL risks to watch

Certificate issues are especially painful on pages tied to trust or transactions.

Checkout

Browsers warning on payment pages can stop orders immediately.

Login

Customers may not trust an account-access page with certificate errors.

Campaign pages

Paid traffic is wasted if a landing page shows security warnings.

APIs behind pages

Certificate issues can also affect first-party requests made by the page.

Best practices

Keep certificate monitoring close to the pages visitors actually use.

Conclusion

SSL certificate monitoring is a simple layer that prevents a preventable class of website incidents.

NorthDuty includes SSL health inside broader website monitoring so trust issues are visible with the rest of the page context.

Related NorthDuty Pages

Keep exploring the feature pages and commercial routes connected to this topic.

Feature

SSL Certificate Monitoring

Monitor SSL certificates with NorthDuty website health checks so validity, trust, and expiry issues are visible before visitors are blocked.

Explore SSL Certificate Monitoring

Feature

Uptime Monitoring

Monitor uptime every 5 minutes by default with HTTP, SSL, DNS, blank-page detection, broken resources, JavaScript errors, and API call tracking.

Explore Uptime Monitoring

Feature

DNS Monitoring

Monitor DNS resolution with NorthDuty as part of website health checks, so domain and resolution issues are visible before important pages become unreachable.

Explore DNS Monitoring

Pricing

Pricing

NorthDuty pricing for website monitoring: Free, $29 Starter, $79 Pro, $199 Business, and $499 Enterprise plans.

Compare pricing plans

Related reading

More NorthDuty guides on related website monitoring topics.

Article

How to Set Up a Public Status Page

Learn how to set up a public status page for your website — what to include, how to manage incidents, and how to schedule maintenance so customers stay informed.

Read How to Set Up a Public Status Page

Article

How to Monitor Website Uptime

Learn how to monitor website uptime, choose the right checks, and catch downtime before it hurts traffic, leads, or sales.

Read How to Monitor Website Uptime

Article

Why Websites Break Without Going Offline

Learn why websites can break without going fully offline and how website health monitoring helps detect silent failures.

Read Why Websites Break Without Going Offline

Frequently Asked Questions

Short answers that summarize the practical takeaways from this guide.

Does NorthDuty monitor SSL expiry?

Yes. NorthDuty records certificate validity and days until expiry as part of website health checks.

Can NorthDuty alert before SSL expires?

Yes. Configure an SSL expiry alert rule with a day threshold and an enabled email destination.

Is SSL monitored separately from uptime?

No. It is part of the same health run that also records uptime, DNS, redirects, resources, JavaScript errors, and API calls.

Call To Action

Start monitoring your website with NorthDuty today.

Use NorthDuty to keep SSL certificate health visible before visitors hit browser warnings.

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