Website Uptime Checker
Run a quick check to see whether a website responds and appears reachable.
Free Tools
NorthDuty Free Tools
NorthDuty free tools help you run quick checks on important website signals. Use them to investigate a problem now, then move into recurring monitoring for long-term protection.
Quick checks for website reliability
A one-time check can tell you whether a site is reachable, whether a certificate is expiring, or whether a page changed unexpectedly. That is useful when a team needs a fast answer.
NorthDuty free tools are designed for exactly that job. They also connect naturally to the broader platform, where the same checks can run continuously with alerts and historical visibility.
Available Tools
Use the tool that matches the issue you want to investigate first.
Website Health Checker
Check whether a page is loading cleanly or showing signs of user-facing problems.
SSL And DNS Checkers
Review trust and routing issues that can make a site look broken to visitors.
Website Change Detector
Look for page changes that may remove or alter important customer-facing elements.
Why free tools are useful
Quick tools give teams a low-friction way to investigate problems before deciding what should be monitored continuously.
- Get a fast signal when a page or domain looks suspicious
- Support launch-day checks and urgent troubleshooting
- Help non-technical teams investigate website issues
- Create a natural next step into recurring monitoring
How to use the tools hub
Move from one-off checks into ongoing protection where it matters most.
1
Pick the tool closest to the issue
Start with uptime, health, SSL, DNS, or page change detection based on the symptom.
2
Run a quick check
Use the tool page to investigate the problem immediately.
3
Review the linked learning and feature pages
Follow the internal links to understand the issue and the broader monitoring solution.
4
Set up recurring monitoring
Move important pages and domains into continuous monitoring if they affect revenue or customer trust.
Tool Pages
Open a tool page to learn what it checks, why it matters, and how to use it.
Tool
Website Uptime Checker
Use the NorthDuty website uptime checker to see whether a website is reachable and whether key pages appear to be loading.
View PageTool
Website Health Checker
Use the NorthDuty website health checker to look for broken pages, blank screens, missing content, and user-facing issues.
View PageTool
SSL Checker
Use the NorthDuty SSL checker to review certificate validity, expiry risk, and HTTPS trust signals that affect website reliability.
View PageTool
DNS Checker
Use the NorthDuty DNS checker to investigate domain routing issues that can affect website reachability and reliability.
View PageTool
Website Change Detector
Use the NorthDuty website change detector to spot missing buttons, changed content, and visible page regressions.
View PageFrequently Asked Questions
Clear answers to common questions about this page and the monitoring problem it covers.
Are the NorthDuty tools free?
The tool pages are designed as free entry points for quick checks and education, with clear paths into the full NorthDuty monitoring platform.
What is the difference between a free tool and the full platform?
A free tool gives you a point-in-time answer. The full platform runs checks continuously, watches more signals, and alerts you when something changes.
Which tool should I start with?
Start with the tool closest to the problem you suspect. If you are unsure, the website health checker is usually the best broad starting point.
Call To Action
Start monitoring your website with NorthDuty today.
Use the NorthDuty free tools for a quick answer, then switch to recurring monitoring for the pages, APIs, and customer journeys your business depends on.