What is FTBLib and why do I need it?

FTBLib is a library mod that all FTB mods depend on. If you're using any FTB modpack or FTB mod, you need this installed first. It provides core functionality and lets you edit configs in-game.

Does FTBLib work with both Forge and Fabric?

Yes. On newer versions, FTBLib is available for both Forge and Fabric. Check the downloads above to get the right version for your mod loader.

How do I change the game mode in my world?

For 1.7.10: Use /ftb_mode set [mode] in chat or edit ftb_gamemode.txt. For 1.9.4 and newer: Use /ftb packmode set [mode] in chat or edit world_data.json.

Can I really edit mod configs in-game?

Yes, FTBLib lets you change some configuration settings right in the game without having to manually edit config files.

Nothing happens when I install FTBLib. Is it broken?

FTBLib is a library mod, so it runs in the background. You won't see a GUI or menu for it. If you installed it correctly and launched Minecraft, it's working. The other FTB mods will use it automatically.

FTBLib Mod (1.19, 1.18.2) | Library for FTB Mods

What is FTBLib?

FTBLib is a library mod that powers all the other FTB mods. If you’re running any FTB modpack, you need this installed first. It handles the backend stuff so the actual FTB mods can work properly. Once it’s in your mods folder, it mostly just sits there doing its job.

Key Features

Edit some config settings directly in-game instead of messing with files
Support for multiple game modes in the same modpack world
Works with both Forge and Fabric

How to Change Game Modes

FTBLib lets you switch between different game modes. Here’s how:

Minecraft 1.7.10

Type /ftb_mode set [mode] in chat, or go to saves/world/ and edit ftb_gamemode.txt

Minecraft 1.9.4 and Newer

Type /ftb packmode set [mode] in chat, or edit saves/world/world_data.json and change the "mode" value

Installation

FTBLib needs Forge or Fabric to work. Here’s the process:

Install Minecraft Forge or Fabric for your version
Download the FTBLib file for your Minecraft version below
Drop the .jar file in your .minecraft/mods folder
Launch Minecraft

Need more help? Check these guides:

Download FTBLib

Latest Versions

Minecraft 1.19

Forge:
FTB-Library-Mod-Forge-1.19.jar
This file is part of FTBLib Mod (1.19, 1.18.2) | Library for FTB Mods. Visit the main page for features, installation guide, screenshots, and more download options.

Size: 563.1 KB
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Fabric:
FTB-Library-Mod-Fabric-1.19.jar
This file is part of FTBLib Mod (1.19, 1.18.2) | Library for FTB Mods. Visit the main page for features, installation guide, screenshots, and more download options.

Size: 553.5 KB
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Minecraft 1.18.2

Forge:
FTB-Library-Mod-1.18.2.jar
This file is part of FTBLib Mod (1.19, 1.18.2) | Library for FTB Mods. Visit the main page for features, installation guide, screenshots, and more download options.

Size: 572.1 KB
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Fabric:
FTB-Library-Mod-Fabric-1.18.2.jar
This file is part of FTBLib Mod (1.19, 1.18.2) | Library for FTB Mods. Visit the main page for features, installation guide, screenshots, and more download options.

Size: 562.3 KB
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Minecraft 1.18.1

Forge:
FTB-Library-Mod-1.18.1.jar
This file is part of FTBLib Mod (1.19, 1.18.2) | Library for FTB Mods. Visit the main page for features, installation guide, screenshots, and more download options.

Size: 558.6 KB
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Fabric:
FTB-Library-Mod-Fabric-1.18.1.jar
This file is part of FTBLib Mod (1.19, 1.18.2) | Library for FTB Mods. Visit the main page for features, installation guide, screenshots, and more download options.

Size: 549.8 KB
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Older Versions

Minecraft 1.16.5

Forge:
FTB-Library-Mod-1.16.5.jar
This file is part of FTBLib Mod (1.19, 1.18.2) | Library for FTB Mods. Visit the main page for features, installation guide, screenshots, and more download options.

Size: 571.4 KB
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Fabric:
FTB-Library-Mod-Fabric-1.16.5.jar
This file is part of FTBLib Mod (1.19, 1.18.2) | Library for FTB Mods. Visit the main page for features, installation guide, screenshots, and more download options.

Size: 552.1 KB
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Minecraft 1.15.2

Forge:
FTB-Library-Mod-1.15.2.jar
This file is part of FTBLib Mod (1.19, 1.18.2) | Library for FTB Mods. Visit the main page for features, installation guide, screenshots, and more download options.

Size: 373.9 KB
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Minecraft 1.12.2

FTBLib-1.12.2.jar
This file is part of FTBLib Mod (1.19, 1.18.2) | Library for FTB Mods. Visit the main page for features, installation guide, screenshots, and more download options.

Size: 912.5 KB
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Minecraft 1.12.1, 1.12

FTBLib-1.12.1.jar
This file is part of FTBLib Mod (1.19, 1.18.2) | Library for FTB Mods. Visit the main page for features, installation guide, screenshots, and more download options.

Size: 681.1 KB
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Minecraft 1.11.2, 1.11, 1.10.2

FTBLib-1.11.2.jar
This file is part of FTBLib Mod (1.19, 1.18.2) | Library for FTB Mods. Visit the main page for features, installation guide, screenshots, and more download options.

Size: 715.5 KB
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Minecraft 1.9.4

FTBLib-1.9.4.jar
This file is part of FTBLib Mod (1.19, 1.18.2) | Library for FTB Mods. Visit the main page for features, installation guide, screenshots, and more download options.

Size: 797.4 KB
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Minecraft 1.8.9

FTBLib-1.8.9.jar
This file is part of FTBLib Mod (1.19, 1.18.2) | Library for FTB Mods. Visit the main page for features, installation guide, screenshots, and more download options.

Size: 584.7 KB
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Minecraft 1.8.0

FTBLib-1.8.0.jar
This file is part of FTBLib Mod (1.19, 1.18.2) | Library for FTB Mods. Visit the main page for features, installation guide, screenshots, and more download options.

Size: 265.6 KB
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Minecraft 1.7.10

FTBLib-1.7.10.jar
This file is part of FTBLib Mod (1.19, 1.18.2) | Library for FTB Mods. Visit the main page for features, installation guide, screenshots, and more download options.

Size: 651.8 KB
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