The fastest browser-based IPv6 connectivity test available.
Six comprehensive tests complete in under 15 seconds by running all checks in parallel. The moment you open the page, it simultaneously tests IPv4-only endpoints, IPv6-only endpoints, dual-stack compatibility, latency, and protocol preferences.
Everything runs client-side with zero backend latency. No server round-trips, no
queuing, no waiting. Written in vanilla JavaScript with no framework overhead
