WebTransport Inspector by moqtap

DevTools extension for inspecting WebTransport connections and MoQT protocol traffic

Inspect WebTransport connections and MoQT protocol traffic right from Chrome DevTools. moqtap adds a new panel to DevTools that gives you full visibility into WebTransport sessions — whether you're debugging a media pipeline or working on MoQT protocol implementations. What it does: - Captures all WebTransport connections on a page, including those created inside Web Workers (essential for WebCodecs and MediaSession workflows) - Auto-detects the MoQT protocol and draft version directly from wire bytes — no configuration needed - Decodes MoQT control messages with full field display, so you can see subscribe requests, track info, and errors as they happen - Tracks active subscriptions with namespace and track name resolution - Shows live bitrate for each session, so you can monitor throughput at a glance - Includes a stream data viewer with hex and JSON modes for inspecting raw payloads - Detects content types automatically — fMP4 video segments, JSON control data, and raw binary - Adds filtering and grouping tools for tracks and streams, including namespace grouping, active-only view, and TX/RX direction filters - Lets you pause stream payload recording without losing control messages or track lifecycle visibility - Captures stack traces for outgoing control messages and unidirectional stream creation, with clickable source links in DevTools - Lets you export and import .moqtrace files to share debug sessions with your team Works with: - MoQT drafts 07 through 17 (auto-detected) - Plain WebTransport connections (non-MoQT) are displayed gracefully - WebTransport in Web Workers and SharedWorkers - High-throughput video streaming sessions (tested at 40+ Mbps) Built for developers working with WebTransport and Media over QUIC Transport. Lightweight, non-intrusive, and designed to stay out of your way on sites that don't use WebTransport. Open source: https://github.com/moqtap/extension