
Modrinth · Minecraft mod
OtterLib
A cool new simple library mod that everyone can use!
Quick answer
Which OtterLib release should I use?
OtterLib 0.4.0.0+26.2 targets 26.2 with folia, paper, purpur. Installation on the client is optional. Installation on the dedicated server is optional. No extra mods listed for this file.
Where it goes
Is OtterLib required on the client, server, or both?
Installation on the client is optional. Installation on the dedicated server is optional.
The source marks this as usable on both the client and server.
What else does OtterLib 0.4.0.0+26.2 need?
0.4.0.0+26.2. 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 OtterLib without breaking your instance.
Built for OtterLib 0.4.0.0+26.2. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use 0.4.0.0+26.2. It targets 26.2 with folia, paper, purpur; 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
Installation on the client is optional. Installation on the dedicated server is optional.
- 04
Pick the file you checked
Use the “Get this file” button beside 0.4.0.0+26.2. It opens that exact file at the source.
About this project
What does OtterLib add?
A simple library mod for minecraft, made mostly to develop my mods easier, but can be used by anyone!
Currently supported loaders: Fabric, Spigot, & Paper
Use in your projects! 👍️
Want to use OtterLib in your project? You can add it as a dependency in your build.gradle file:
repositories {
maven {
name "oth3rMavenSnapshots"
url "https://maven.oth3r.one/snapshots"
}
}
Implementing on each loader, where ${project.otterlib_version} is the current version of OtterLib for the loader (e.g. 0.2.0.0+1.21.6, 0.2.0.0+1.20-1.21.6)
// fabric
modImplementation "one.oth3r:otterlib:${project.otterlib_version}-fabric"
// spigot
implementation "one.oth3r:otterlib:${project.otterlib_version}-spigot"
// paper
implementation "one.oth3r:otterlib:${project.otterlib_version}-paper"
Visit the maven repository to see more indepth information about the library, including the latest versions.
Features
💬 Simple Chat Builder
sample usage:
player.sendMessage(new CTxT("Hello").color(Color.BLUE).bold(true).strikethrough(true)
.append(new CTxT("World!!!!!!!!!").rainbow(new Rainbow(true)).underline(true).italic(true)).b());
in game example:

📜 Custom Language Reader
OtterLib provides a custom language reader that allows you to easily have server-side localization on all supported loaders. There is also support for a secondary location for locales for easy player overrides.
🗃️ Robust file saving and loading
Adds an interface that enables easy config file creation with support for saving, loading, and updating versions easily.
updating an old entry from the json to the new version:
@Override
public void update(JsonElement jsonElement) {
JsonObject file = jsonElement.getAsJsonObject();
if (file.get("version").getAsDouble() == 1.0) {
this.version = 1.1;
this.test = file.get("test-bool").getAsBoolean();
}
}
⚙️ Custom config screen
OtterLib offers a custom config screen that can be cuztomized to offer a way to edit multiple config files, link to social media, or even open different screens.
creating the screen:
client.setScreen(new ConfigScreen(client.currentScreen, Text.of("test"),
new CustomImage(Identifier.of(FabricTest.MOD_ID, "textures/gui/banner.png"),240, 60),
// the list of buttons to be displayed in the middle
List.of(
SimpleButton.Templates.fileEditor(new CTxT("Test File"), FabricTest.testFile, new CustomImage(Identifier.of(FabricTest.MOD_ID, "button/server_button"),246,26)).build(),
SimpleButton.Templates.fileEditor(new CTxT("Test File No Image"), FabricTest.testFile).build(),
SimpleButton.Templates.wiki(new CTxT("Help")).openLink("https://oth3r.one").size(30,30).build(),
SimpleButton.Templates.wiki(new CTxT("Help")).openLink("https://oth3r.one").size(30,30).build(),
SimpleButton.Templates.warning(new CTxT("Help")).openLink("https://oth3r.one").size(150,15).hideText(false).build()
),
// the bottom buttons can be customized!
List.of(
new SimpleButton.Builder(new CTxT("Donate"))
.miniIcon(new CustomImage(Identifier.of(Assets.ID, "icon/donate"),15,15)).build(),
SimpleButton.Templates.donate(new CTxT("Donate")).openLink(URI.create("https://ko-fi.com/oth3r")).build(),
SimpleButton.Templates.done(new CTxT("Done")).build(),
SimpleButton.Templates.wiki(new CTxT("Wiki")).openLink("https://oth3r.one").build()
)));
main config screen in game:

file editor in game: (individual entry editor is planned, this is just a simple placeholder)

Project description from Modrinth.
Pick your setup
OtterLib by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
26.1.2
2 loader builds26.1.1
2 loader builds26.1
3 loader builds1.21.11
2 loader builds1.21.10
2 loader builds1.21.9
2 loader builds1.21.8
2 loader builds1.21.7
3 loader builds1.21.6-pre1
2 loader builds1.21.6
3 loader builds1.21.5
3 loader buildsShowing the newest 12 of 24 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
OtterLib versions and loaders
0.4.0.0+26.2
paper-0.4.0.0+26.2-paper-all.jar
28 Jun 2026
0.4.0.0+26.2
spigot-0.4.0.0+26.2-spigot-all.jar
28 Jun 2026
0.4.0.0+26.2
otterlib-0.4.0.0+26.2-fabric.jar
28 Jun 2026
0.3.0.1+26.2
otterlib-0.3.0.1+26.2-fabric.jar
21 Jun 2026
0.3.0.1+26.1
otterlib-0.3.0.1+26.1-fabric.jar
16 May 2026
0.3.0.0+26.1.1
otterlib-0.3.0.0+26.1.1-fabric.jar
1 Apr 2026
0.3.0.0+26.1
otterlib-0.3.0.0+26.1-fabric.jar
25 Mar 2026
0.2.2.1+1.21.11
otterlib-0.2.2.1+1.21.11-fabric.jar
10 Dec 2025
0.2.2.1+1.21.10
otterlib-0.2.2.1+1.21.10-fabric.jar
7 Oct 2025
0.2.2.1+1.21.9
otterlib-0.2.2.1+1.21.9-fabric.jar
2 Oct 2025
0.2.2.1+1.21.8
otterlib-0.2.2.1+1.21.8-fabric.jar
20 Aug 2025
0.2.2.0+1.21.1
otterlib-0.2.2.0+1.21.1-fabric.jar
27 Jul 2025
Looking for an older file? The official Modrinth project page is in Resources.