Question 1

How does the uptime checker work?

Accepted Answer

Our checker sends an HTTP HEAD request to your domain over HTTPS (falling back to HTTP) and measures the response time. It reports the HTTP status code, whether the server is reachable, and how quickly it responds. A status code below 500 is considered online.

Question 2

What does a 200 OK response mean?

Accepted Answer

HTTP 200 OK means the server received the request and returned a successful response. Your site is online and reachable. 3xx codes indicate redirects, 4xx indicate client errors (like 404 Not Found), and 5xx indicate server errors.

Question 3

What is a good response time for a website?

Accepted Answer

Under 300ms is excellent, 300-800ms is good, 800-2000ms is fair, and over 2000ms is slow. Slow response times increase bounce rates significantly — studies show 53% of mobile users abandon pages that take over 3 seconds to load.

Question 4

How is this different from continuous monitoring?

Accepted Answer

This tool performs a one-time check from our server. For continuous 24/7 monitoring with alerts when your site goes down, sign up for CertNotify monitoring which checks your site every few minutes and sends email or WhatsApp alerts instantly on downtime.

Question 5

Why does my site show as unreachable even though it loads in my browser?

Accepted Answer

Your site may block server-to-server HEAD requests, use IP-based access restrictions, require JavaScript to load (SPAs), or be behind a CDN/WAF that blocks automated requests. Try checking a specific resource URL or ensure your site accepts requests from external servers.

Website Uptime Checker

Uptime Checker FAQ