Check Website
Try:
Terminal Output
; TechOreo Website Down Checker
; Checks reachability via your browser's network
; ──────────────────────────────────────────────
; Enter a domain above and click Check Now
Check if a website is down for everyone or just you. Tests DNS resolution, HTTP reachability, and response time instantly.
This tool performs two independent checks to give you a complete picture of a website's availability. First, it queries Cloudflare's DNS over HTTPS API to confirm the domain resolves to a valid IP address. Second, it uses your browser's Fetch API to attempt an HTTP connection and measure the response time.
github.com) or full URL (e.g. https://github.com) in the input boxWhen a site fails to load, the issue could be the server itself, your ISP, your DNS provider, or your local network. This tool checks from your browser — if DNS fails and HTTP fails, the site is likely down globally. If DNS resolves but HTTP fails, CORS is usually the reason, not an outage.
Under 200 ms is excellent. 200–1000 ms is acceptable. Over 1 second may indicate server load or geographic distance. Over 3 seconds typically signals a serious performance issue and will negatively impact Google's Core Web Vitals score and your SEO rankings.
Browser-based checks are subject to CORS (Cross-Origin Resource Sharing). Many websites block cross-origin requests as a security measure, causing a "Likely UP" result even when the site is healthy. A dedicated server-based monitor like UptimeRobot or Pingdom bypasses CORS entirely for more accurate results.
A site can have a valid DNS record but still be unreachable if the server has crashed or a firewall is blocking traffic. Conversely, DNS can fail (expired domain, misconfigured nameservers) while the server is technically running. Checking both layers pinpoints exactly what is broken.