Internet Root Cause Diagnostic

This is designed to find the cause of buffering even when a normal speed test looks excellent. For the most useful result, run it on the affected Wi‑Fi with no other large downloads/uploads active.

Ready

Overall assessment

Run the test first.

Connection / public network

Latency, jitter & stability

Sustained throughput

Bufferbloat under download load

Bufferbloat under upload load

Streaming / chunk stability

CDN / destination clues

Browser limitations & what remains untested

Raw results

No results yet.