Adding LiteLoader to a FTB modpack Client (1.6.x+)


  • Open the FTB Launcher
  • Go to the 'Options' tab and make a note of the 'Install folder...'


  • Browse to the FTB install folder
  • Browse to this location within the FTB install folder create any directories that don't exist: \libraries\com\mumfrey\liteloader\1.6.4



  • Click OK
  • Now browse to your modpack's 'minecraft' folder: \\minecraft
  • Find the pack.json file and open it in a text editor. e.g. Notepad


  • Add '--tweakClass com.mumfrey.liteloader.launch.LiteLoaderTweaker' to the "minecraftArguments" section (line 2)
  • Add the following to the top of the libraries section:

"name": "com.mumfrey:liteloader:1.6.4",
"url": ""

  • Save the file


  • 25796 Users Found This Useful

Was this answer helpful?

 Print this Article

Also Read

Crashing on connecting after riding a vehicle or entity

This article relates to an incompatibility between the Archimedes Ships mod and blocks added by...

Ender Storage in Deep Dark Prevents Server Start

The following error occurs when the server starts: java.lang.NullPointerExceptionat...

How to select the Modpack Build in the Feed the Beast Launcher

The Feed the beast client will ask you to update your game when a new version is released, when...