Download CoreProtect 1.21.10

Download CoreProtect 1.21.10.md

updated 8th Dec, 2025 for 1.21.10

Tutorial of Downloading and Building the CoreProtect Plugin

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.

Prerequisites

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

Start Compiling

• Right click the "Start" or "Windows" icon on your taskbar.

• Click "Command Prompt".

• Type the following commands.

cd Desktop
git clone https://github.com/PlayPro/CoreProtect.git

AFTER USING GIT CLONE

You 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!

I recommend that you join the official CoreProtect discord, the build instructions are posted there and this is where you can find the updated steps.

Taken from discord:

Compilation instructions:
Install Maven and Java 25 if you don't have it already
Linux: sudo apt install maven (or whatever package manager you have )
Windows: Watch this tutorial https://www.youtube.com/watch?v=XEphzGQz-nI
Check with mvn --version that it's installed, and using java 25

Download the source code
You can download the zip manually from GitHub, under the green button labelled "<> Code".
After downloading it, extract it.
Or if you have git with git clone https://github.com/playPro/coreProtect

Open the CoreProtect folder you just created

Set the branch to development
Locate the "pom.xml" file, and open it with a text editor.
Locate where it says<project.branch></project.branch>
Set it to be <project.branch>development</project.branch>

ONLY IF YOU NEED 26.1 SUPPORT:
Navigate to src/main/java/net/coreprotect/config/
Open the "ConfigHandler.java" file with a text editor
On line 56, set the LATEST_VERSION string to 26.1.2
It should look like this: public static final String LATEST_VERSION = "26.1.2";

Open a terminal in the coreprotect folder
On windows you can click the explorer path bar and type cmd, this will open a command prompt at the location.
Please note you have to be in the CoreProtect folder, not any subfolder, not the external folder either
If you are on Linux i assume you know how to do this

In the terminal run the command mvn clean install

If you see a class file has wrong version error, it means you have not installed java 25. Install it and make sure to change your environment variable for JAVA_HOME. Check again with mvn --version

You should now find "CoreProtect-23.2.jar" in the target/ folder.

Note:
While the file will say it's 23.2, it is functionally equivalent to the 24.0 Patreon version, and will work in 26.1 and 26.1.2 (if you changed the files).

I recommend that you join the official CoreProtect discord, the build instructions are posted there and this is where you can find the updated steps.

Taken from discord:

Compilation instructions: Install Maven and Java 25 if you don't have it already Linux: sudo apt install maven (or whatever package manager you have ) Windows: Watch this tutorial https://www.youtube.com/watch?v=XEphzGQz-nI Check with mvn --version that it's installed, and using java 25

Download the source code You can download the zip manually from GitHub, under the green button labelled "<> Code". After downloading it, extract it. Or if you have git with git clone https://github.com/playPro/coreProtect

Open the CoreProtect folder you just created

Set the branch to development Locate the "pom.xml" file, and open it with a text editor. Locate where it says<project.branch></project.branch> Set it to be <project.branch>development</project.branch>

ONLY IF YOU NEED 26.1 SUPPORT: Navigate to src/main/java/net/coreprotect/config/ Open the "ConfigHandler.java" file with a text editor On line 56, set the LATEST_VERSION string to 26.1.2 It should look like this: public static final String LATEST_VERSION = "26.1.2";

Open a terminal in the coreprotect folder On windows you can click the explorer path bar and type cmd, this will open a command prompt at the location. Please note you have to be in the CoreProtect folder, not any subfolder, not the external folder either If you are on Linux i assume you know how to do this

In the terminal run the command mvn clean install

If you see a class file has wrong version error, it means you have not installed java 25. Install it and make sure to change your environment variable for JAVA_HOME. Check again with mvn --version

You should now find "CoreProtect-23.2.jar" in the target/ folder.

Note: While the file will say it's 23.2, it is functionally equivalent to the 24.0 Patreon version, and will work in 26.1 and 26.1.2 (if you changed the files).

You should credit @guss-alberto for this :(

You should credit @guss-alberto for this :(

I never said I wrote those steps myself, how am I supposed to know the discord author's github handle?

all your comments on this issue bring absolutely nothing to the subject, maybe you should just mind your own business