Packet Logger
by sootysplash
Packet Logger records the network packets a Fabric client sends and receives during play, and writes them to JSON files.
What it does
While a player is in a world or connected to a server, Packet Logger keeps a record of outgoing and incoming packets with their relevant data. Each session is saved as a separate JSON file, stored in a packet-logs folder and named with timestamps, so logs from earlier sessions are kept apart. Because packet class names are not human readable in the Minecraft code, the output is also not human readable until the packet names are mapped; the author has listed the outgoing packet names manually, and support for incoming packets is planned.
The mod is client-side only, so only the client needs it. It requires Fabric API, Cloth Config API and Mod Menu, and is open source under the Apache License 2.0. Builds exist for 1.19.2, 1.19.3, 1.19.4, 1.20, 1.20.1, 1.20.2, 1.20.3 and 1.20.4, with 1.0.1 for 1.20.4 as the latest Fabric file.
Key features
Packet recording
Records packets sent and received during play, including the data each packet carries.
Session JSON files
Each session is written to its own JSON file in the packet-logs folder, with timestamps in the file names.
Configuration screen
Logger settings are adjusted through Cloth Config, opened from the Mod Menu entry.
Gallery
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Requirements
Dependencies declared by the latest file for each loader.
Required 2
How it compares
SpectatorTp is a client-side Fabric mod for 1.19 – 1.20.4, open source under the MIT License. Ping Logger is server-side only and uses a custom license that is not open source, with files for 1.21.1 – 1.21.11.
| Mod | Loaders | Game versions | Environment | Updated |
|---|---|---|---|---|
| Packet Logger | Fabric | 1.19.2 – 1.20.4 | Client-side only | 2024-07-12 |
| SpectatorTp | Fabric | 1.19 – 1.20.4 | Client-side only | 2023-06-03 |
| Ping Logger | Fabric | 1.21.1 – 1.21.11 | Server-side only | 2026-06-23 |
Questions
Does Packet Logger need Fabric API?
In the catalog
Packet Logger is one of 36,990 Utility mods on ModsFinder, and one of 25,772 Utility mods for Fabric. 13,907 mods support Minecraft 1.20.4.
More from sootysplash
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What the author says
This mod logs all packets (including all relevant data) that you send to the server, and saves it to a seperate JSON (written and saved on disconnect, inside the 'packet-logs' folder) file with timestamps! Minecraft code is non human readable, so reading packet class names leads to a non human readable output, I've…
Official listing
- Modrinth page
- modrinth.com/mod/packet-loggers
- Owner
- sootysplash
- Published
- 2024-02-15
- Updated on Modrinth
- 2024-07-12
- Facts verified
- 2026-10-15