
Modrinth · Minecraft mod
Cardboard
Implements the Bukkit/Spigot/Paper API as a Fabric mod.
Quick answer
Which Cardboard release should I use?
Cardboard 26.1-6 targets 26.1.2 with Fabric. Do not install it on the client. It must be installed on the dedicated server. No extra mods listed for this file.
Where it goes
Is Cardboard required on the client, server, or both?
Do not install it on the client. It must be installed on the dedicated server.
This file is marked server-only.
What else does Cardboard 26.1-6 need?
26.1-6. Change the file and its required mods may change too.
This file does not list any required mods. Do not add a library just because a different file uses it.
This file does not list any required or optional mods.
Before you install it
Add Cardboard without breaking your instance.
Built for Cardboard 26.1-6. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use 26.1-6. It targets 26.1.2 with Fabric; another release may have different loader, side or dependency requirements.
- 02
Bring the mods it needs
This file does not list any required mods. Do not add a library just because a different file uses it.
- 03
Put it on the correct side
Do not install it on the client. It must be installed on the dedicated server.
- 04
Pick the file you checked
Use the “Get this file” button beside 26.1-6. It opens that exact file at the source.
About this project
What does Cardboard add?
Cardboard

Cardboard is a Fabric mod that adds support for the popular Bukkit/Spigot/Paper modding API.
This mod lets you use plugins that are made for Bukkit and it's derivatives (Spigot & Paper) with Fabric.
Cardboard is still in development and will not support every plugin.
Versions
1.21.1, 1.21.11, 26.1.2
Note: Only latest version is actively supported
Server
This project is partnered with ApexHosting! Join our test server, cardboardmod.apexmc.co:25666, or get a Minecraft server by clicking on the banner below:
License
We inherit the license from Paper.
See Paper's License.
Project description from Modrinth.
Pick your setup
Cardboard by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
26.1.1
1 loader build26.1
1 loader build25w45a
1 loader build1.21.11-rc3
1 loader build1.21.11-pre1
1 loader build1.21.11
1 loader build1.21.10
1 loader build1.21.8
1 loader build1.21.4
1 loader build1.21.1
1 loader build1.20.6
1 loader buildShowing the newest 12 of 20 game versions. Older files are in the list below.
Check the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
Cardboard versions and loaders
26.1-6
Cardboard-26.1.2.jar
20 Jul 2026
26.1-5
Cardboard-26.1.2.jar
12 Jul 2026
26.1-4
Cardboard-26.1.2.jar
13 Jun 2026
1.20.1-13
Cardboard-1.20.jar
14 Feb 2026
1.21.11-14
Cardboard-1.21.11.jar
14 Feb 2026
1.21.11-13
Cardboard-1.21.11.jar
14 Feb 2026
1.21.11-12
Cardboard-1.21.11.jar
13 Feb 2026
1.21.11-11
Cardboard-1.21.11.jar
1 Feb 2026
1.21.11-10
Cardboard-1.21.11.jar
24 Jan 2026
1.21.11-9
Cardboard-1.21.11.jar
24 Jan 2026
1.21.11-8
Cardboard-1.21.11-1.21.11.jar
24 Jan 2026
1.21.10-15
Cardboard-1.21.10.jar
5 Jan 2026
Looking for an older file? The official Modrinth project page is in Resources.

