Network Test

A free reachability check for browsers. Confirms this workstation can resolve DNS, reach public HTTPS endpoints, and open a WebSocket, and measures round-trip latency and jitter. Useful for isolating whether a "page won't load" ticket is local firewall, internet outage, or an app-specific issue. It measures latency, not download bandwidth - it is not a speedtest.

Read the Network Test guide for help interpreting the verdict.

Privacy: This tool sends a small no-cors GET to a fixed list of public endpoints (Cloudflare, Google, Microsoft, Cloudflare DNS, public WebSocket echo). The targets see only that some browser pinged them - no credentials, no business data, no telemetry to us. View source to confirm the target list. No analytics, no tracking.

Configuration

Driver: Browser fetch + WebSocket APIs

Takes about 20 seconds. The test issues no-cors pings to public CDNs and a single WebSocket echo; no business data is sent.

Status Check Step

Pending

Browser reports network connectivity

Reads navigator.onLine and navigator.connection for an effective-type estimate.

1 of 5

Pending

DNS and HTTPS are reachable

Issues no-cors pings to five public CDNs and DNS endpoints in parallel.

2 of 5

Pending

WebSocket connectivity is allowed

Opens a single WebSocket to the desktest edge and measures round-trip time.

3 of 5

Pending

Captive portal and HTTP/3

Confirms no captive portal is rewriting responses, and checks whether QUIC (HTTP/3 over UDP 443) negotiated.

4 of 5

Pending

Latency, jitter, and IPv6

Measures round-trip latency and jitter to the desktest edge, and reports whether egress is IPv4 or IPv6.

5 of 5