# How to install your own server .jar (OpenMod) on your Minecraft server

**URL:** <https://forum.boxtoplay.com/t/how-to-install-your-own-server-jar-openmod-on-your-minecraft-server/31766>\
**Category:** Minecraft\
**Tags:** minecraft, english\
**Created:** [Mai 26, 2026, 2:36 UTC](https://forum.boxtoplay.com/t/how-to-install-your-own-server-jar-openmod-on-your-minecraft-server/31766 "2026-05-26T14:36:27Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Julien](https://forum.boxtoplay.com/user_avatar/forum.boxtoplay.com/julien/32/5579_2.png) [@Julien](https://forum.boxtoplay.com/u/Julien)\
**Post date:** [Mai 26, 2026, 2:36 UTC](https://forum.boxtoplay.com/t/how-to-install-your-own-server-jar-openmod-on-your-minecraft-server/31766/1 "2026-05-26T14:36:27Z")

</div>

![How to install your own server .jar (OpenMod) on your Minecraft server](https://forum.boxtoplay.com/uploads/default/original/2X/a/a056935fa19e0277f055c344f281feb9e609eeef.png)

### How to install your own server .jar (OpenMod) on your Minecraft server

On BoxToPlay, you can use the **OpenMod** feature to launch your Minecraft server with **any** `.jar` file, instead of being limited to the versions available through the panel.

* * *

### 📌 What is OpenMod used for?

OpenMod lets you:

- Run a specific server version such as Paper, Spigot, or Purpur, even if it is not available in the automatic installer
- Test development builds or snapshots
- Use custom Minecraft server forks

* * *

### ⚙ Step 1: Upload your `.jar` file

1. Log in to your BoxToPlay panel.
2. Select the server you want to modify.
3. Open **Options** , then **File access (FTP)**.

 ![port us 5](https://forum.boxtoplay.com/uploads/default/original/2X/f/f5303bb90d1ed713501fcb884114daab4f87f739.png)

1. Upload your `.jar` file to the **root** of the server, at the same level as folders like `plugins` and `world`.

 ![image](https://forum.boxtoplay.com/uploads/default/original/2X/e/e9a0a4ada5ffd9c557875515feae72e3c425e493.png)

**Important:** The file must be placed directly in the root, not inside a subfolder.

* * *

### ⚙ Step 2: Enable OpenMod and select your `.jar`

1. Go to **Minecraft Installation** then **Standard Installation**.

 ![image](https://forum.boxtoplay.com/uploads/default/original/2X/f/fe2d25d7ae231ad1094a7a3142578a1dc4cf1df3.png)

1. Enable the **.jar selection (OpenMod)** toggle.
2. Select your `.jar` file from the dropdown list.

![Animation](https://forum.boxtoplay.com/uploads/default/original/2X/b/bc3d2bdf0324441b8d10a989d6a12f5912f129bd.gif)

1. Your custom `.jar` is now installed on your server.
2. Return to the main page of your server.
3. Click **Start** to launch it.

💡 **Example:** Here, I installed **Folia** , which is not available through the automatic installer, and the console clearly confirms that it started successfully.

 ![image](https://forum.boxtoplay.com/uploads/default/original/2X/f/f28370b9944b32de5e03b817efdf3d47efda22b3.png)

* * *

### 🔧 Troubleshooting

If something does not work as expected:

- Check that your `.jar` file is placed in the server root
- Make sure the file is not corrupted
- Verify that the selected server version is compatible with your Java version
- Review the server logs for startup errors

### ✅ Best practices

- Use clear file names such as `Paper-1.21.1.jar`
- Keep a backup copy of your configuration files
- Test new builds on a separate server when possible, especially if you already have a live setup

* * *

💎 **Need more resources for your server?**

 ![image](https://forum.boxtoplay.com/uploads/default/original/2X/3/3fe0ca70449e2f6405a1aedc6ee2c88667aafbbc.jpeg)

**Did you know?**  
You can try this feature for free with our Minecraft offers and benefit from **12 hours of free access** using the link below.

👉 [Discover our Minecraft offers](https://www.boxtoplay.com/en/minecraft-hosting/minecraft-server)