One URL or a whole list. Check them from here.
Ready when you are. No checks run until you ask.
HTTP code, response time and a clear explanation.
Checks run from our London server. Times include DNS, TLS and response headers—not an ICMP ping.
A single check is a snapshot, not a global outage verdict. Access restrictions and HTTP errors are shown separately.
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Submitted URLs are sent to this server and requested from London. We request HTTP response headers without downloading the page body, running scripts, logging in or sending your cookies. Targets can see this server's IP and our checker user-agent. Do not submit confidential links or credentials.
Results are a point-in-time view from one location. A 2xx response indicates a successful HTTP reply; it does not prove that every feature works. A 401, 403 or 429 means the server responded but restricted access. Other 4xx/5xx codes are HTTP errors. Network, DNS, TLS and timeout failures are reported separately and do not establish a global outage.
Checks allow public HTTP/HTTPS targets on ports 80/443, follow at most three validated redirects and stop after eight seconds per URL. Private/reserved targets are blocked. Batches contain at most 20 URLs. Work is bounded and rate-limited. Brief in-memory IP counters enforce limits; submitted URLs and results are not stored as history or written to app access logs.
There are no app cookies, analytics or advertising trackers. Hosting/proxy providers still process connection data and Cloudflare security settings may set their own cookies. SkeleTrace links are ordinary links.