CraftTweaker
CraftTweaker allows modpacks and servers to customize the game. With CraftTweaker you can change recipes, script events, add new commands and even change item properties!
About this Mod
CraftTweaker is a Minecraft mod which allows modpacks and servers to customize the game. With CraftTweaker you can change recipes, script events, add new commands and even change item properties! When used with other mods the possibilities become endless. Ranging from custom machine recipes to entirely new blocks and items!
CraftTweaker lets you customize the game to your hearts content, from simple things like changing recipes or adding tooltips to items, to more advanced things like subscribing to events or changing properties about items! When combined with addon mods, the possibilities truly become endless, with things like adding completely new blocks and items to the game and even adding new completely custom trees to the world gen!
Most modpacks you have played with use CraftTweaker to change their recipes, removing conflicting recipes or even building a central theme for their modpack!
All the information you need to get started with CraftTweaker can be found on the Wiki and if you need more help, you can join the Discord and ask for help there!
If you would like to support me in my modding endeavors, you can become a patron via 
Patreon.
This project is sponsored by Nodecraft. Use code JARED for 30% off your first month of service!
Available Versions
How to Install CraftTweaker on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set fabric Loader
In the panel under "Egg", select the fabric loader and matching Minecraft version (1.21.1).
Install Mod
Open the mod browser in the dashboard and search for "CraftTweaker". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.1, 1.21, 1.20.6 (+33 more)
Server-side
✓ RequiredRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
CraftTweaker server crashes on startup – what to do?
Most common cause: wrong fabric version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.1). You can switch loaders with one click in the panel.
Is CraftTweaker compatible with fabric and forge and neoforge?
CraftTweaker officially supports fabric, forge, neoforge for Minecraft 1.21.1, 1.21, 1.20.6. Note: Forge and Fabric mods are NOT cross-compatible – pick one loader and stick with it. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with CraftTweaker – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if CraftTweaker consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.
Similar Mods
Rent Modded Server
Install CraftTweaker with just one click on your server.