Is It Down? Website Uptime Checker

A website uptime checker makes a live request to a URL from our server and reports whether DNS resolves, the HTTP status and the response time. It answers the question: is it down for everyone, or only for me?

This tool fetches the address you enter once, from our server, and reports what a crawler would receive. The URL is not stored; only a short-lived rate-limit counter is kept. Results show the page at the moment of the check and can differ from what a logged-in browser or a bot with different headers sees.

How to read the result and act on it

A pass means DNS resolved and the server answered with a success or redirect status. A fail with no response points to DNS, a refused connection or a block of our checker. A 5xx status means the server is reachable but erroring, which you should investigate in logs. Note the response time: consistently slow replies are a warning even when the site is up. If the result disagrees with what you see, test from another network and check whether a firewall or rate limit is involved.

Common mistakes to avoid

Do not treat one check as proof of uptime, because outages can be brief. Another mistake is testing the wrong address, such as http versus https or with and without www, which can behave differently. Do not rely on a manual tool for alerts: set up a monitor. And remember our request may be blocked by security rules that allow normal visitors.

How do I know if a website is down for everyone?

Check it from a different network or tool. If an outside checker also gets an error or no response, the problem is likely at the site, not your connection.

What does a 503 error mean?

The server is temporarily unable to handle the request, often due to overload or maintenance.

Can downtime hurt SEO?

Short outages usually do not. Long or repeated downtime can cause Google to crawl less and, if it persists, drop pages from results.

• HTTP Status Code Checker: Check the HTTP status of up to 10 URLs at once: 200, 301, 404, 500 and more.
• Server Response Time Checker: Measure time to first byte and total download time for a URL from our server.
• Redirect Checker: Trace every redirect hop from a URL to its final destination, with status codes.

Browse all 41 free technical seo tools, or see the full free SEO toolbox. If you would rather have this handled for you, take a look at our technical SEO services and the results from real projects.