Free internet diagnostics
The right tool.
A clearer answer.
Check your connection, inspect your browser, investigate a domain or troubleshoot email.
Free to use · No account required
16 tools and an ASN reference available
01
Check my connection
Understand your IP, VPN and exposure.
02
Inspect my browser
See the signals websites can read.
- Browser FingerprintInspect identification signals
- Bot DetectionCheck automation indicators
- Request HeadersRead browser request metadata
03
Investigate a domain
Explore domain and network evidence.
04
Troubleshoot email
Inspect domain policies or a message.
- Email SecuritySPF, DKIM, DMARC and more
- Email Header AnalyzerTrace delivery and reported auth
Headers stay in your browser
Want a broader connection check?
The privacy scan brings several checks together.