Redefining iOS network debugging.
An iOS network debugger for capturing and inspecting HTTP(S), WebSocket, and SSE traffic at L3 IP layer.
Perfect for iOS developers debugging API calls, security researchers analyzing app behavior, or anyone who needs deep insight into mobile network traffic.
- License
- MIT
- Minimum OS
- iOS 18+
- Capture layer
- L3
- Privacy model
- On-device
Built for production debugging
Comprehensive network visibility with the tools you need to diagnose and resolve issues fast.
Device-wide capture
Network Extension-based packet tunnel configures a system proxy to capture HTTP(S) for apps that honor it. No per-app setup, no desktop companion required.
TLS inspection
On-device MITM with dynamic certificate generation. Full request/response body visibility for encrypted traffic.
WebSocket & SSE
Real-time frame-by-frame capture of WebSocket and Server-Sent Events with full timing context.
Traffic modification
Rewrite rules, breakpoints, JS scripts, host overrides, request maps, and network throttling profiles.
Deep inspection + PCAP export
Headers, JSON/XML/image body viewers, timing breakdowns, TLS certificate chains, HTTP/2 HPACK table, request comparison, and saved filter presets—plus optional PCAP export for offline analysis.
Engineering depth
Built on iOS system frameworks for reliable, low-level network access.
Network Extension
Implements NEPacketTunnelProvider to configure system proxy settings. Runs in a separate process with elevated privileges.
TLS MITM
On-device certificate authority and dynamic certificate generation. Intercepts TLS handshakes locally with no external dependencies.
App Groups
Shared container for IPC between main app and extension. Enables real-time traffic streaming and coordinated state management.
Packet Tunnel
Proxy-only tunnel injects NEProxySettings without routing raw packets. HTTP/HTTPS flows through the local proxy for inspection.
Widgets & Live Activities
WidgetKit integration for at-a-glance network statistics. Live Activities show real-time request counts and transfer rates.
Background Processing
Efficient proxy processing with minimal battery impact. Optimized memory usage for extended capture sessions.
Open source and transparent
Free under the MIT license. No pricing tiers, no feature gates, no telemetry. Inspect, modify, and contribute to every line of code.