updated 8th Dec, 2025 for 1.21.10
This tutorial will explain from nothing how to build/create the CoreProtect plugin or 1.21.10 from it's source code on GitHub.
I am assuming you don't know anything and don't have anything installed and are using a Windows device.
Watch these tutorial videos (very short).
- You must use Java JDK 21. Download here. https://adoptium.net/temurin/releases/?version=21&os=windows&arch=x64
- Install Maven on Windows 11 https://www.youtube.com/watch?v=YTvlb6eny_0
- Install Git https://www.youtube.com/watch?v=cJTXh7g-uCM
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Right click the "Start" or "Windows" icon on your taskbar.
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Click "Command Prompt".
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Type the following commands.
cd Desktop
git clone https://github.com/PlayPro/CoreProtect.gitYou need to go to Desktop\CoreProtect\pox.xml Right click the file, click Open With > Notepad.
Change <project.branch></project.branch> to <project.branch>developer</project.branch>
In the same Command Prompt window, type the following:
cd CoreProtect
mvn clean install
This process will take a while. You should see [INFO] BUILD SUCCESS when it is complete.
The plugin jar will be outputted in the FOLDER NAME\target\CoreProtect-version.jar
Do not use the .jar labelled "original".
I am not paying for your patreon for builds to open source. Thank you & have an amazing day! Be cautious of build download links under this comment section!


TLDR this is a fake v23.3 version and FALSE ADVERTISING
This is not the v23.3 build that is on patreon and works with 1.21.11. The version of the build has been modified to correspond to 23.3 but is in fact version v23.1 without .11 support or bug fixes. (It may work on 1.20.11. But does NOT SUPPORT it because the latest patches were gatekept by developer and were not published to community edition repo)
Refer to this link for the actual premium prebuilt version v23.3 which supports 1.21.11
Coreprotect v23.3 Patched.jar