TCP Viewer

TCP Viewer provides a focused view of TCP traffic for developers and network engineers. It supports live capture from local interfaces or analysis of pre-recorded traces, requiring a target_host and target_port for directed analysis. It explains session boundaries, handshakes, and timing without decrypting payloads, making it suitable for debugging latency, retransmissions, and connection stability on Windows environments.
Conceptually, the tool parses TCP headers, tracks per-connection state, and builds a concise timeline of segments, flags, sequence numbers, and window sizes. It offers filters to isolate noise (specific IPs or ports) and computes metrics such as average RTT, retransmission rate, and out-of-order deliveries. Advanced modes enable RTT refinement and window-usage analysis.
Who benefits include software developers, QA testers, and IT ops teams needing reproducible network visibility. The value lies in a lightweight footprint, deterministic outputs, and compatibility with Windows tracing formats; it supports exporting results to CSV or PCAP-like dumps for integration with other workflows.
Core features and use cases include real-time session view, summary metrics, per-connection timelines, export options, and scriptable data feeds. Typical workflows: capture live traffic to diagnose latency spikes, load traces to verify connection stability under load, or compare before/after changes to network stacks. It differentiates itself by focusing on TCP-level insight with straightforward, reproducible outputs.