NetAssistant

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NetAssistantHigh-Performance Cross-Platform Network Debugging Tool

Built with Rust · TCP/UDP Client & Server · Multiple Decoders · Built-in Stress Testing · GPU-Accelerated UI

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🔌

Multi-Protocol Support

Full support for TCP/UDP client and server modes, IPv4/IPv6 dual stack, adapting to any network environment.

📦

Smart Decoders

Four TCP decoders — raw data, line-delimited, length-prefix and JSON — effectively solving sticky packet issues; send and receive in hex mode.

💬

Chat-Style Message Log

Intuitive display of packet exchanges, with favorites & remarks, keyword search, real-time logging and TXT/JSON/CSV export.

🚀

High-Concurrency Stress Testing

Built-in stress engine with real-time QPS, latency percentiles (p50/p95/p99), failure breakdown, variable templates and CSV report export.

🤖

Automated Testing

Auto-reply to simulate the peer, periodic send for long-run stability tests, and smart UDP broadcast reply display for device discovery.

🎨

Modern Interface

GPU-accelerated rendering powered by the GPUI framework at a smooth 60fps; dark mode follows the system automatically, with multi-tab connection management.

Screenshots ​

Client Mode ​

Client mode screenshot

Server Mode ​

Server mode screenshot

Stress Testing ​

Stress testing screenshot

Dark Mode ​

UDP server dark mode screenshot

Why NetAssistant ​

  • Blazing performance: Rust + Tokio async runtime, startup < 100ms, memory footprint < 20MB, million-level concurrent connections
  • Built for debugging: from network app development to hardware and embedded debugging, covering the entire communication verification workflow
  • Cross-platform: full support for Windows, Linux and macOS, with native builds for both x64 and ARM64
  • Open source and free: released under the Apache-2.0 License, contributions welcome

For more details, see Features; to get started, read the Guide. To see how it compares with NetAssist and similar tools, check the Comparison.

Released under the Apache-2.0 License

Copyright © 2026 SunJary