All checks at a glance. Cheap probes run automatically; the throughput test waits for your click — it downloads ~20 MB.
What our server sees about you on this connection.
| user-agent | Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com) |
|---|---|
| accept-encoding | gzip, br, zstd, deflate |
Sees what IP addresses your browser would expose to a peer via WebRTC, even with a VPN active.
Computes JA3 from your browser's TLS ClientHello — the exact fingerprint a DPI sees.
Checks which DNS resolvers actually answer for you — even when a VPN is active.
Streams a 10 MB payload across two paths to detect QoS-based throttling. Asymmetric throughput usually means traffic shaping on one of the paths.
Test downloads ~20 MB total (10 MB per path). Skip if you are on metered mobile data.
Technical tool for diagnosing the quality of a network connection. Does not provide means of access to information resources whose access is restricted under applicable law.