WitnessAI HAR Capture

Enterprise network recorder. Captures HAR with full WebSocket and SSE visibility for troubleshooting and integrations.

WitnessAI HAR Capture is an enterprise network recording tool built for IT teams and support engineers to troubleshoot application issues and accelerate new app integrations. When troubleshooting application issues or onboarding new SaaS integrations, reproducing the exact sequence of network calls is critical. This extension captures every HTTP request, WebSocket connection, and Server-Sent Event stream into a standard HAR 1.2 archive -- ready to share with vendors, attach to support tickets, or analyze offline. KEY CAPABILITIES - Full HAR 1.2 recording with request/response headers and bodies - WebSocket frame capture with complete send/receive message logs - Server-Sent Event (SSE) stream recording, including fetch-based streams - Automatic page reload on capture start to record the full page lifecycle - Cache disabled during capture to ensure fresh server responses - Preserve log across page navigations -- nothing is lost - Organized export: per-domain folders for WebSocket and SSE connections with clearly labeled message direction and parsed JSON payloads - Domains visited listed in the capture summary BUILT FOR ENTERPRISE WORKFLOWS - Troubleshooting: Hand a complete network recording to WitnessAI or internal team. No more asking users to "open DevTools and try again." - New app integrations: Record the full API surface of a SaaS application during evaluation. See every endpoint, every payload structure, every real-time channel. - Security review: Capture and audit exactly what network calls an application makes, including WebSocket and SSE channels that standard HAR exports miss. - Incident response: Reproduce and document network-level behavior for post-incident analysis. HOW IT WORKS 1. Navigate to any website 2. Click the WitnessAI icon and press Start Capture 3. The page reloads automatically with caching disabled 4. Use the application as normal -- all traffic is recorded 5. Click Stop and Export to download a .zip archive PRIVACY All data stays on your device. The extension makes zero network requests of its own. No analytics, no telemetry, no cloud sync. Captured data is held in browser memory during the session and saved locally when you export.