Website & Domain Troubleshooting Tools
Find out why your website or email is not working
Check your domain, DNS, hosting signals, SSL, redirects and business-email configuration in one report. Get the most likely cause first, then the evidence and exact repair path.
FreeNo accountPrivate reportsClear fixes
Website not loading?Check DNS, HTTP, HTTPS and IPv6.
Email stopped?Check MX, SPF, DKIM and DMARC.
SSL warning?Inspect certificate and hostname coverage.
Redirect loop?See every hop and the conflicting path.
Start with the failing layer
See all troubleshooting areas →Focused diagnostic tools
One domain, one repair path
The answer comes before the technical tables
1Scan public configuration
DNS, HTTP, TLS, mail and crawler checks run as independent evidence sources.
2Connect related signals
Rules distinguish a broken DNS layer from a certificate, application, mail or redirect problem.
3Fix the most important cause
Provider-specific instructions explain where to make the change and how to confirm it worked.
Exact errors
All error guides →Diagnose the message you actually see
Cloudflare Error 520Cloudflare received an empty, unknown or unexpected response from the origin server.Test your domain →Cloudflare Error 521Cloudflare reached the network but the origin refused the connection.Test your domain →Cloudflare Error 522Cloudflare timed out while trying to communicate with the origin server.Test your domain →Cloudflare Error 523Cloudflare cannot reach the configured origin network.Test your domain →Cloudflare Error 524Cloudflare connected to the origin but the origin did not return a response before the proxy timeout.Test your domain →Cloudflare Error 525The TLS handshake between Cloudflare and the origin failed.Test your domain →Cloudflare Error 526Cloudflare could not validate the certificate presented by the origin while using strict certificate validation.Test your domain →Cloudflare Too Many RedirectsThe browser is being redirected repeatedly, often because the edge and origin disagree about HTTPS behavior.Test your domain →
Provider repair paths
All providers →Same problem, correct control panel
Not sure where the problem is?
Check my websiteRun the complete website health check.
It checks the website, DNS, SSL, redirects and business email together so you do not have to guess which tool to start with.