Mac App Store 1.4.0 is hereNow with a protocol assistant

Connect devices.
Inspectevery detail.

From client connections to server listeners, from a single packet to a full session. A clearer way to test TCP devices, inspect data, and troubleshoot connections.

Get it on the Mac App Store Windows / Linux

One-time purchase on Mac · Free on Windows / Linux

TCP Debug Assistant client and server connection manager, captured on macOS — One workspace. Both sides of TCP.Explore the app

Connection modesClient + Server

Data formatsHEX / ASCII / Binary / JSON

Interface languagesSimplified Chinese / English

Desktop platformsmacOS / Windows / Linux

Built for connections. Ready for details.

From connection to insight.
Everything within reach.

For network development, device testing, and protocol troubleshooting.
Keep everyday tasks in one workflow.

Debug either side of TCP

Open a TCP connection or listen on a port for devices. Manage each connected client in its own session.

See your data in the right format

Switch between HEX, ASCII, Binary, and JSON. Frame packets by length prefix, delimiter, or fixed length.

Individual packets. Full conversations.

Inspect packets one by one or read a continuous session stream, with clear send/receive direction, connection status, and byte counts.

Repeat tests with less effort

Reuse sent messages and schedule repeated sends. Export packets as CSV, JSON, or TXT for further analysis.

Switch languages without restarting

Choose Simplified Chinese or English and apply it instantly. Your active connections keep running.

Make the workspace your own

Choose a dark or light theme, word wrapping, monospace text, or a data-only view for comfortable reading.

Protocol assistant · Mac App Store 1.4.0

From a device manual
to a packet ready to send.

Keep protocol definitions, field-based packet building, and verification in one workspace. Prepare and validate data without connecting to a device.

Create protocols in natural language or by handPaste samples and documentation and let AI organize them into field drafts, or add fields in a visual form. Your chosen provider is called only after you confirm the submitted content.
Build packets from fields in real timeFill in parameters and get correct HEX instantly. Invalid input is flagged in place and stale packets stay disabled. Saved protocols can be reused across windows.
Local parsing and sample validationSelect a packet to highlight each field's offset and length, and validate the rules against a sample HEX. Parsing runs entirely on your machine.

The protocol assistant ships with Mac App Store 1.4.0. You still confirm every send manually; AI never reads connection traffic or replies to devices automatically.

The protocol assistant building a HEX packet from fields on macOS

A closer look at the real app

See clearly. Debug smoothly.

Switch between light and dark themes.
Keep your everyday tools close at hand.

Connect to devices or accept incoming connections. Manage every session independently.

Captured on macOS

Ready for your next connection

Choose your platform.

TCP Debug Assistant
The same workflow across desktop platforms.

APP STORE

macOS

Intel and Apple Silicon · App Store 1.4.0
Install and update through the App Store, including the protocol assistant.

View on the App Store One-time purchase. No subscription. The public Windows / Linux release is currently 1.3.0.

Connect devices.Inspectevery detail.

From connection to insight.Everything within reach.