logwindow-mcmod
This is a simple and practical Minecraft Forge (1.20.1) mod, designed specifically for developers and players who need debugging tools. Features
Standalone Log Window: Automatically pops up an independent Java Swing window when the client launches.
Real-time Log Interception: Intercepts all Log4j2 log outputs and displays them in real-time within the window, making it easy to track mod loading and game performance.
Safe to Close: Closing the log window directly will not crash the game. You can safely close it at any time.
Memory Control: Supports a customizable line limit to prevent high memory usage during extended gameplay sessions.
How to Use
Download the packaged .jar file.
Place it into your .minecraft/mods folder.
Launch the game, and the log window will automatically appear.
Configuration
After launching the game for the first time, a logwindows-client.toml file will be generated in the config directory:
maxLines: Sets the maximum number of lines retained in the log window. The default value is -1 (unlimited). You can set it to 10000 to prevent the log from becoming too long and consuming too much memory.
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.20.1
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on Modrinth — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
Verified by MCModsHub
- Ships as logwindows-1.0.0.jar — drop this file into the mods folder
- Download size: 8 KB
- Download link checked 23 Sept 2026 — working
These come from our own check of the pack file, not from the source page.