HTTP and network failures
4xx and 5xx responses, failed files, timeouts, dropped connections and third-party requests that don’t answer.
SEO testing · Free tool
Server Error Intelligence.
Find the HTTP, network and security-policy errors on a page, including the ones that only appear after scrolling or using a menu. Get one finding per real problem, with evidence and a clear fix.
- Desktop and mobile run together, automatically
- Related errors joined into one finding
- One Jira document with every issue, ready to edit
Testing…
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Starting…
What it checks
Evidence, not just error messages.
This tool looks at server, network and browser security failures. Rendering and hreflang have their own tools.
CORS and CSP
Chrome’s structured reasons, whether a policy really blocked something or only reported it, and who needs to change what.
The whole page
Progressive scrolling and safe controls such as menus, tabs and accordions. Each problem keeps the steps that exposed it.
Server configuration
DNS, TLS certificates, redirect chains, caching and CDN or firewall responses, checked directly as well as in Chrome.
One finding per defect
A failed request, its CORS error and its console message become one finding, however many times and on whichever device it happened.
Safe by design
Never submits forms, buys or logs out, and only accepts cookies if you ask it to. Cookies and personal data are removed from reports.
Pick up where you left off
Your recent checks.
Reports are kept for 30 days.