# NetworkCat

A free TCP/UDP/WebSocket client for testing and debugging your own network programs and devices, from a solo indie portfolio.

- **Category:** [Utilities](https://notchlist.vercel.app/category/utilities/)
- **Price:** Free
- **Open source:** no
- **Official site:** https://apps.apple.com/us/app/networkcat/id6503148471
- **Available via:** Mac App Store
- **Requirements:** macOS 13 or later, per the Mac App Store listing.
- **Maker:** 旭中 何 (xuz.net)

## Kitsmith's take

Built for developers debugging network code or hardware (like Modbus devices), not for monitoring your own Mac’s bandwidth: send and receive raw ASCII or HEX data over TCP, UDP, or WebSocket, with request history, an ASCII lookup table, and AT-command line-ending helpers. From 旭中 何, a solo developer whose portfolio also includes a lunar calendar and an exchange-rate app — the bundle ID’s reverse-DNS matches the resolved domain exactly.

## Features

- **TCP, UDP, and WebSocket:** Client and server modes, plus UDP unicast/multicast/broadcast.
- **ASCII and HEX:** Send and receive in either format, with automatic conversion between them.
- **Connection history and logging:** Searchable send/receive history per target, with timestamps and traffic counts.

## FAQ

**Is NetworkCat free?**

Yes, per its Mac App Store listing.

**Is NetworkCat a network monitor?**

No — it’s a TCP/UDP/WebSocket client for testing and debugging your own network programs or devices, not a bandwidth or connection monitor.

**Who makes NetworkCat?**

Developer 旭中 何, whose portfolio also includes a Chinese lunar calendar app and an exchange-rate app.


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Hand-verified listing on Kitsmith: https://notchlist.vercel.app/apps/networkcat/