Is this website down?
Check if a website is down right now or just for you — see response time and HTTP status instantly.
What does "website down" mean?
Down for everyone vs. just you
If this checker shows the site is up but you cannot access it, the issue is on your end — try clearing your browser cache or checking your internet connection.
Temporary outages
Most outages last only a few minutes. A server restart, a failed deployment, or a traffic spike can cause brief downtime that resolves on its own.
HTTP status codes
2xx means OK, 3xx is a redirect, 4xx signals a client error (like 404 Not Found), and 5xx means the server itself is having trouble.
DNS & connection failures
If the site cannot be reached at all, it may be a DNS propagation issue, an expired domain, or the server being completely offline.
Response time
Under 500 ms is fast. 500 ms–1.5 s is moderate. Over 1.5 s is slow and may feel broken to visitors even if the site technically responds.
Why monitor continuously?
A one-time check only tells you the current state. SiteBrief checks your site every minute so you know the moment it goes down — not hours later.
Frequently asked questions
How does this website down checker work?
Our server sends a real HTTP request to the URL you enter and measures whether it gets a response. If the server replies — even with an error code — the site is considered up. If the connection fails or times out, the site is down.
Why does the checker show the site is up when I cannot access it?
The site may be reachable from our servers but blocked or unreachable for you due to a local network issue, ISP block, firewall, or DNS problem on your device.
Is a 404 or 500 response considered "up"?
Yes. Any HTTP response means the server is online and reachable. A 404 means the page was not found; a 500 means the server encountered an error — but the server itself is running.
How often should I check my website?
Manual checks are useful for troubleshooting. For ongoing protection, use a monitoring service like SiteBrief that checks every minute and alerts you instantly when something goes wrong.
Need 24/7 uptime monitoring?
SiteBrief checks your site every minute and sends instant alerts by email or Slack when it goes down. Add unlimited sites, track response times, and get PDF reports — all for free.
Start monitoring for free