Welcome to F3 Changer Wiki

A lightweight Minecraft Fabric mod that allows you to customize the F3 debug menu keybinding.

📦

Easy Installation

Simple installation process with Fabric Loader and Fabric API.

⌨️

Customizable

Rebind the F3 key to any key you prefer through the controls menu.

🌍

Multi-Language

Supports English and German translations out of the box.

⚡

Lightweight

Minimal performance impact with clean Mixin implementation.

What is F3 Changer?

F3 Changer is a Minecraft Fabric mod designed to give you full control over the F3 debug menu keybinding. By default, Minecraft uses the F3 key to toggle the debug overlay, which can be inconvenient or conflict with other applications.

With this mod, you can easily rebind the debug menu to any key of your choice, making your gameplay experience more comfortable and personalized.

Quick Start

  1. Install Fabric Loader and Fabric API
  2. Download F3 Changer from Modrinth
  3. Place the mod in your mods folder
  4. Configure the keybinding in game

Installation

Prerequisites

  • Minecraft Version: 1.21.9
  • Mod Loader: Fabric
  • Required Dependency: Fabric API

Step-by-Step Guide

Step 1: Install Fabric Loader

Download and install Fabric Loader from fabricmc.net

  1. Download the Fabric installer
  2. Run the installer and select Minecraft version 1.21.9
  3. Click "Install" to complete the process

Step 2: Download Fabric API

Get Fabric API from Modrinth

Make sure to download the version compatible with Minecraft 1.21.9

Step 3: Download F3 Changer

Download the latest version of F3 Changer from Modrinth

Step 4: Install the Mods

  1. Locate your Minecraft installation folder:
    • Windows: %appdata%\.minecraft
    • macOS: ~/Library/Application Support/minecraft
    • Linux: ~/.minecraft
  2. Open the mods folder (create it if it doesn't exist)
  3. Place both Fabric API and F3 Changer .jar files into the mods folder

Step 5: Launch the Game

Start Minecraft and select the Fabric profile. The mod should now be loaded!

⚠️ Important Notes

  • Always use mods from trusted sources like Modrinth or CurseForge
  • Make sure all mods are compatible with your Minecraft version
  • Back up your worlds before installing new mods

Usage

How to Use F3 Changer

Once installed, F3 Changer integrates seamlessly with Minecraft's controls system.

Configuring Your Keybinding

Step 1: Open Controls Settings

Launch Minecraft and navigate to:

Options → Controls → Key Binds

Step 2: Find the Debug Menu Category

Scroll down until you find the "Debug Menu" category. This is where F3 Changer's keybinding is located.

Step 3: Change the Keybinding

  1. Click on "Open Debug Menu (F3)"
  2. Press the key you want to use for the debug menu
  3. The new keybinding will be saved automatically

Step 4: Test Your New Keybinding

Exit the menu and press your newly configured key. The F3 debug overlay should now toggle on and off!

Tips & Tricks

  • Recommended Keys: Try keys like F4, F5, or even mouse buttons for easy access
  • Conflict Warning: The game will warn you if your chosen key conflicts with another binding
  • Reset to Default: Simply rebind to F3 if you want to restore the default behavior

Configuration

Keybinding Configuration

F3 Changer uses Minecraft's built-in keybinding system. All configuration is done through the in-game controls menu.

Configuration File

Your keybinding preference is automatically saved in Minecraft's options.txt file:

%appdata%\.minecraft\options.txt (Windows)
~/Library/Application Support/minecraft/options.txt (macOS)
~/.minecraft/options.txt (Linux)

Advanced Configuration

The mod stores the keybinding using the key:

key_key.debug_changer.open_debug_menu

You can manually edit this in options.txt if needed, though the in-game menu is recommended.

Supported Input Types

  • Keyboard Keys: Any keyboard key can be used
  • Mouse Buttons: Extra mouse buttons are supported
  • Key Combinations: Not currently supported

Frequently Asked Questions

Q: Does this mod work on servers?

A: Yes! F3 Changer is a client-side mod, so it works on any server without requiring the server to have it installed.

Q: Is this compatible with other mods?

A: Yes, F3 Changer uses Mixins and should be compatible with most other mods. If you encounter conflicts, please report them on GitHub.

Q: Can I use this mod with OptiFine?

A: F3 Changer is designed for Fabric. For OptiFine compatibility, you'll need OptiFabric. However, we recommend using Sodium and Iris instead for better performance and compatibility.

Q: The keybinding isn't working. What should I do?

A: Try these troubleshooting steps:

  • Make sure Fabric API is installed
  • Check that the mod appears in your mods list
  • Verify there are no keybinding conflicts
  • Try restarting Minecraft

Q: Can I bind it to a key combination like Ctrl+F3?

A: Currently, key combinations are not supported. Only single keys or mouse buttons can be used.

Q: Will this mod be updated to newer Minecraft versions?

A: Updates are planned for future Minecraft versions. Check the Modrinth page for the latest releases.

Q: Is this mod open source?

A: Yes! The source code is available on GitHub under the Apache License 2.0.

Q: Can I contribute to the project?

A: Absolutely! Contributions are welcome. Feel free to open issues or submit pull requests on GitHub.

Changelog

Version 1.0.0 - 2025-10-08

Initial Release

  • ✨ Custom keybinding for F3 debug menu
  • ⚙️ Full integration with Minecraft's controls system
  • 🌍 English and German translations
  • 🔧 Clean Mixin implementation
  • 📦 Compatible with Minecraft 1.21.9

Future Plans

  • Support for newer Minecraft versions
  • Additional language translations
  • More customization options
  • Performance optimizations