Certificate validity
Review whether the certificate appears active and usable for the domain.
Free Tool
SSL Checker
Use this NorthDuty SSL checker to review whether a website's certificate appears valid and trustworthy for visitors.
Run A Quick SSL Check
Enter a URL to review whether HTTPS trust signals look healthy and whether certificate issues may be putting the visitor experience at risk.
What the SSL checker looks for
SSL issues can make a healthy site look unsafe, unavailable, or broken to visitors.
Expiry risk
Identify whether a certificate may be close to expiry and needs attention.
Trust and HTTPS readiness
Check whether there are visible trust issues that could trigger browser warnings or customer hesitation.
A practical health signal
Use the result as part of broader website health monitoring, especially for important conversion pages.
Why an SSL checker matters
Customers are unlikely to continue when a browser suggests the site may not be trustworthy.
- Reduce the risk of trust warnings on important pages
- Support a more reliable checkout, login, and signup experience
- Catch certificate issues before they become public-facing problems
- Help non-technical teams understand a common website trust risk
- Create a path into recurring website health monitoring
How to use the SSL checker
Run it on any domain or page where HTTPS trust matters.
1
Enter the website URL
Use the domain or route you want to verify.
2
Run the SSL check
Review whether the certificate looks valid and whether any visible trust issues appear.
3
Investigate warnings quickly
If the check suggests risk, review certificate coverage, renewal timing, and HTTPS configuration.
4
Add recurring monitoring
If the site is business-critical, use NorthDuty to make certificate and page health issues easier to catch automatically.
Go Beyond One-Off Checks
Use the free tool for a quick answer, then move into recurring monitoring for your most important pages and journeys.
Feature
Website Health Monitoring
Use NorthDuty for website health monitoring to detect broken pages, blank screens, missing elements, SSL issues, DNS issues, and performance problems.
View PageFeature
User Journey Monitoring
Monitor login, checkout, navigation, and form submission flows with NorthDuty user journey monitoring.
View PageArticle
Why Websites Break Without Going Offline
Learn why websites can break without going fully offline and how website health monitoring helps detect silent failures.
View PageArticle
Best Website Monitoring Tools
Compare website monitoring tools and learn how to choose the right option for uptime, page health, user journeys, and business-critical reliability.
View PagePricing
Pricing
Explore NorthDuty pricing for website monitoring, uptime monitoring, website health monitoring, and user journey monitoring.
View PageFrequently Asked Questions
Clear answers to common questions about this page and the monitoring problem it covers.
What does an SSL checker do?
An SSL checker helps review whether a website's certificate appears valid and whether HTTPS trust issues may affect visitors.
Why do SSL issues matter for website monitoring?
Because they can make a site feel broken or unsafe to visitors even when the underlying page is technically online.
Which pages are most important to check?
Checkout, login, signup, account, and payment-related pages are especially important because trust matters most there.
Call To Action
Start monitoring your website with NorthDuty today.
Use the free SSL checker to review certificate health, then use NorthDuty to monitor trust, page quality, and customer-facing reliability over time.