Website Up or Down Checker
Enter a URL to check if the website is currently up or down globally.
Server processing — your query is handled securely on our servers.
How to use Website Up or Down Checker
The Is It Down tool checks whether a website is reachable from our servers and reports the HTTP status code and response time, helping you tell the difference between a site that is genuinely offline and one that is simply unreachable from your own network. When a page will not load, the cause might be the server itself, your ISP, a DNS problem or a local firewall. By testing from an independent vantage point, this tool answers the first question — "is it just me?" — so you know whether to keep troubleshooting locally or wait for the site owner to fix an outage.
- Enter the website domain or full URL you want to test.
- Click Check to request the site from our independent servers.
- Read the status: reachable with a status code, or unreachable.
- Note the response time to gauge whether the site is slow rather than down.
- Re-test after a short interval to see if an outage is ongoing.
“Down for everyone” versus “down for me”
A site that loads here but not for you points to a local problem: your DNS cache, a browser extension, a corporate firewall or an ISP routing issue. A site that is unreachable from our servers as well is more likely experiencing a real outage or a DNS misconfiguration affecting everyone. Distinguishing these two cases immediately tells you where to direct your effort — flushing your local cache and trying another network for the former, or contacting the site owner and waiting for the latter.
Reading the status code and timing
A 200 status means the server responded normally. A 5xx status means the server is reachable but erroring, which is an application problem rather than a connectivity one. A timeout with no status usually means the host is offline or blocking probes. Response time matters too: a site that answers in several seconds is not down but is degraded, which can feel like an outage to users. Together the code and timing give a clear picture of the site’s real health.
| Result | Likely meaning |
|---|---|
| 200 OK, fast | Site healthy |
| 200 OK, slow | Site up but degraded |
| 5xx error | Server reachable but failing |
| Timeout / no response | Host offline or blocking probes |
Glossary
- Status code
- The HTTP result code returned by a server, such as 200, 404 or 503.
- Timeout
- A failure that occurs when no response arrives within an allowed time window.
- Uptime
- The proportion of time a service is available and responding correctly.
- Latency
- The delay between sending a request and receiving the first byte of the response.
- Probe
- An automated request used to test whether a host is reachable.
Related reading
Frequently Asked Questions
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Why use Website Up or Down Checker?
- Real-time DNS lookups using live resolver queries
- Supports IPv4 and IPv6 addresses
- No software to install — runs entirely in the browser
- Results include TTL values and record priority
Common use cases
- Verify DNS propagation after updating nameservers
- Check MX records when troubleshooting email delivery
- Look up SPF/DKIM/DMARC records for email security audits
- Test whether a SSL certificate is valid and up to date
- Find the IP address behind a domain name
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