How to Use Releases – MobCrafter Hub

Last updated: June 30, 2026

Before you start — prerequisites

Every Hub release requires a working Minecraft Forge installation with the MobCrafter mod installed. Before you attempt to install any release:

Minecraft Java Edition — MobCrafter is a Forge mod for Java Edition. It does not work on Bedrock Edition.
Minecraft Forge — Download the correct Forge version for the Minecraft version listed on the release page. Forge installer: files.minecraftforge.net.
MobCrafter mod — Install the MobCrafter mod JAR into your Forge mods folder: .minecraft/mods/. Download from CurseForge.
Dependency mods — Check the release page for any listed dependency mods. Dependency mods must also be installed in .minecraft/mods/. If a dependency is missing, the unit may fail to render or summon.
Launch Minecraft with the Forge profile at least once to let the mod generate its configuration folders before adding files manually.

Installing a MobCrafter unit JSON

This is the most common Hub release type. A unit JSON is a plain-text file that describes the block structure of a summonable unit.

On the release detail page, click the Download Unit JSON button to save the file to your computer.
Locate your Minecraft installation folder. On Windows, open File Explorer and type %appdata%\.minecraft in the address bar and press Enter.
Navigate to .minecraft\config\mob_crafter\units\. If the units folder does not exist, create it manually.
Copy the downloaded .json file into the units folder.
Launch (or restart) Minecraft with the Forge + MobCrafter profile. The unit will be automatically loaded from that folder when the game starts.
Use MobCrafter's in-game commands or items to summon the unit.

File naming: The filename of the JSON (without the .json extension) is the unit's identifier. If you rename the file, the in-game unit ID changes. Do not rename unless you have a reason to.

Conflicts: If you already have a unit with the same filename, the new file will overwrite it. Rename one of them to keep both.

Multiplayer: On a server, place the JSON in the server's config/mob_crafter/units/ directory instead. The server distributes unit data to connected clients automatically.

Installing a schematic file (.schem or .litematic)

Some releases include a schematic for placing the block build directly in your world using a schematic mod. Two schematic types are commonly used:

.schem — WorldEdit format. Requires WorldEdit or CraftTweaker with WorldEdit support. Place .schem files in .minecraft\config\worldedit\schematics\ (or the equivalent folder for your WorldEdit version). Load with //load filename and paste with //paste.
.litematic — Litematica format. Requires the Litematica mod. Place .litematic files in .minecraft\schematics\. Open the Litematica menu in-game (default M) → Load schematic → place and materialize.

Check the release description for which schematic type is included and which mod the creator recommends using it with.

Installing a ZIP pack

ZIP packs may contain any combination of unit JSONs, schematics, resource pack files, README instructions, or other creator assets. They are not Minecraft mod JARs — do not drop them in mods/.

Download the .zip file from the release page.
Read the README file first. Most ZIP packs include a README.txt or README.md file inside the archive that explains exactly which files go where. The structure varies by creator.
Extract the ZIP archive using File Explorer (right-click → Extract All) or a tool like 7-Zip.
Follow the README's file placement instructions. Typically, unit JSONs go in config/mob_crafter/units/ and schematics go in the appropriate schematic folder.

If there is no README and the ZIP contains several folders, look at the folder names for hints — folders named units, schematics, or mods indicate where their contents should be placed in your Minecraft directory.

External releases

Some creators host their primary files on their own platforms — CurseForge, Patreon, GitHub, Gumroad, or personal sites. On these releases, the Hub page links out to the creator's download page.

For external releases, follow the installation instructions provided by the creator on their platform. MobCrafter Hub does not control external hosting and cannot guarantee the availability of externally-hosted files.

Common errors and troubleshooting

Unit not appearing in-game after installing JSON: Confirm the file is in config/mob_crafter/units/ (not a subfolder), that the game was restarted after copying, and that all dependency mods are installed. Check the Minecraft log for errors mentioning the unit filename.
Unit appears but has missing blocks (holes or gray cubes): At least one dependency mod is missing. Re-read the release description, install all listed mods, and restart the game.
Schematic fails to load or paste: Confirm you are using the correct schematic mod (WorldEdit for .schem, Litematica for .litematic). Also check that the schematic was saved for the same Minecraft version you are running.
Download fails or the download button does nothing: Try a different browser. If the problem persists, the release may have a configuration issue — report it via the Contact page.
ZIP extraction gives a "file is corrupted" error: Re-download the file. If the error persists, contact the creator directly via their support link on the release page.

Frequently asked questions

Can I add these units to a modpack? Only with the creator's explicit permission. Check the access type on the release page — "Free" does not automatically mean "licensed for modpack redistribution." Contact the creator if you are unsure.
Is MobCrafter Hub affiliated with Mojang or Microsoft? No. MobCrafter Hub is an independent, community-run platform. It is not endorsed by, affiliated with, or funded by Mojang Studios or Microsoft.
The 3D preview in the browser looks different from the in-game unit. Which is correct? The in-game unit is authoritative. The 3D preview uses an approximation of block textures that may differ from what you see with your specific resource pack or mod setup.
Can I use Hub units on a multiplayer server? Yes — place the unit JSON in config/mob_crafter/units/ on the server. Clients do not need to have the file locally; the server syncs it. However, all players need the same mods installed (including MobCrafter and dependency mods).