promotional bannermobile promotional banner

Packet Spy

PacketSpy is a network debugging tool for Minecraft. It intercepts and logs packets sent (TX) and received (RX) by the client. It features a local web interface (hosted via Java-WebSocket) that allows users to view packet traffic in real-time.

File Details
DownloadInstall

PacketSpy-2.0.jar

ByAnder507
  • R
  • Jan 4, 2026
  • 146.74 KB
  • 126
  • 1.21.3+3
  • Fabric

File Name

PacketSpy-2.0.jar

Supported Versions

  • 1.21.3
  • 1.21.2
  • 1.21.1
  • 1.21

Curse Maven Snippet

Fabric

modImplementation "curse.maven:packet-spy-1420706:7417471"
Curse Maven does not yet support mods that have disabled 3rd party sharing

Learn more about Curse Maven

# Changelog

## Version 2.0 - The "Terminal" Update

This is the first major release of the revamped PacketSpy, designed for Minecraft 1.21.x.

### New Features
*   **Web Interface V2.0**: Completely redesigned "Dark Terminal" UI for a better hacking feel.
*   **Real-Time Monitoring**: Watch packets fly by in real-time on `http://localhost:8887`.
*   **Silence Packets**: Added a `[X]` button next to packets to instantly silence them. Manage silenced packets via the "SILENCED" menu.
*   **Smart Filtering**:
    *   Toggle "Movement" packets on/off to reduce spam.
    *   Filter by category: Player, Interface, Entities, World, Misc.
    *   Regex search support.
*   **Export**: Easily export currently visible packets to a text file for analysis.
*   **Multi-Version Support**: Built to work across the entire 1.21.x family (1.21.0 to 1.21.11).

### Technical
*   Injects into `ClientConnection` for robust packet interception.
*   Uses `Java-WebSocket` for the backend server.
*   Configuration saved to `config/packetspy.json`.