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UI4JD MCPACK
File conversion

Convert UI4JD to MCPACK

Verified by Adam B.· reviewed by FE Editorial ·updated Aug 3, 2026
QUICK ANSWER
Is it possible to convert UI4JD to MCPACK?
Yes - UI4JD converts to MCPACK.

You don't convert a single .ui4jd file on its own; you bundle the entire Project 4JD UI add-on folder (which contains the ui4jd directory plus its manifest and resources) into a ZIP and rename it to .mcpack. Only a complete, correctly structured add-on will actually install in Minecraft Bedrock.

Also to MCPACK: MCWORLD

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Tested on macOS, Windows & Linux
Last verified Oct 2026

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Why convert UI4JD to MCPACK?

A .ui4jd is just the JSON config that tells the Project 4JD UI add-on how to alter Minecraft Bedrock's interface, while an .mcpack is the installable add-on package Bedrock recognizes on double-click. People make the .mcpack so the pack (including its .ui4jd files) can be imported straight into the game.

How to convert UI4JD to MCPACK

7-Zip (Windows) FREE

Select the add-on's top folder (with its manifest.json and ui4jd directory), right-click and choose 7-Zip > Add to archive, set format to zip, then rename the result from .zip to .mcpack.

Built-in Compress (Windows/macOS) EASIEST

Right-click the add-on folder and pick Compress to ZIP file (Windows) or Compress (macOS Finder), then change the extension of the resulting .zip to .mcpack.

Minecraft Bedrock Edition APP

Double-click the finished .mcpack while Bedrock is installed; the game auto-imports it and lists it under resource/behavior packs in settings.

About these formats

.UI4JD Project 4JD UI Configuration File

A UI4JD file is a configuration file from the Project 4JD UI resource pack for Minecraft Bedrock Edition, which recreates the older 4J Studios legacy console interface. Inside it is JSON-UI…

Open .UI4JD details →
.MCPACK MCPACK File

A .MCPACK file is a data file used by specific software.

Open .MCPACK details →

Quality & what to watch

  • Zip the folder's contents at the top level, not an extra parent folder, or the pack structure breaks and Bedrock refuses it.
  • A lone .ui4jd file will not install; it must sit alongside a valid manifest.json and the rest of the add-on.
  • Renaming only changes the extension, not the data - a malformed or incomplete add-on still fails to load in-game.

Frequently asked questions

Can I just rename a .ui4jd file to .mcpack?
No. An .mcpack is a ZIP of the whole add-on; a single .ui4jd JSON file inside it can't install on its own.
Is an .mcpack really just a .zip?
Yes, it's a standard ZIP archive with the extension changed to .mcpack so Bedrock imports it on double-click.
Do I need to enable file extensions to rename it?
Yes, turn on file-extension display in your file manager so you can change .zip to .mcpack rather than adding a second extension.
How do I install the finished pack?
Double-click the .mcpack with Minecraft Bedrock installed, then activate it in a world's resource/behavior pack settings.