
Modrinth · Minecraft mod
oωo (owo-lib)
A general utility, GUI and config library for modding on Fabric and Quilt
Quick answer
Which oωo (owo-lib) release matches 1.21.10 NeoForge?
oωo (owo-lib) 0.12.28+1.21.10 targets 1.21.10 with NeoForge. Installation on the client is optional. Installation on the dedicated server is optional. No extra mods listed for this file.
Where it goes
Is oωo (owo-lib) 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 oωo (owo-lib) 0.12.28+1.21.10 need?
0.12.28+1.21.10 on 1.21.10 NeoForge. Every mod below is checked against that same setup.
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 oωo (owo-lib) without breaking your instance.
Built for oωo (owo-lib) 0.12.28+1.21.10 on 1.21.10 NeoForge. Pick another file and the loader, install side or required mods may change.
- 01
Stick to this file
Use 0.12.28+1.21.10. It targets 1.21.10 with NeoForge; 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 0.12.28+1.21.10. It opens that exact file at the source.
About this project
What does oωo (owo-lib) add?

A general utility, GUI and config library for modding on Fabric and Quilt
Features include:
owo-ui, a fully-featured declarative UI library for building dynamic, beautiful screens with blazingly fast development times
owo-config, a built-in, customizable configuration system built on top of owo-ui. It provides many of the same features as Cloth Config while many new conveniences, like server-client config synchronization, added on top
A fully automatic registration system that is designed to be as generic as possible. It is simple and non-verbose to use for basic registries, yet the underlying API tree is flexible and can also be used for many custom registration solutions
Item Group extensions which allow for sub-tabs inside your mod's group as well as a host of other features like custom buttons, textures and item variant handling
A fully-featured networking layer with fully automatic serialization, handshaking to ensure client compatibility and a built-in solution for triggering parametrized particle events in a side-agnostic manner
Client-sided particle helpers that allow for easily composing multi-particle effects
Rich text translations, allowing you to use Minecraft's text component format in your language files to provide styled text without any code
owo is documented in two main ways:
- There is rich, detailed JavaDoc throughout the entire codebase
- There is a wiki with in-depth explanations and tutorials for most of owo's features over at https://docs.wispforest.io/owo/features
Project description from Modrinth.
Pick your setup
oωo (owo-lib) by Minecraft version and loader
Choose the version and loader you play, then open the matching release.
26.1.1
2 loader builds26.1
2 loader builds1.21.11
2 loader builds1.21.10
1 loader build1.21.1
2 loader builds1.21
2 loader buildsCheck the dependencies, then try the file in a copied instance before changing a world you care about.
Recent files
oωo (owo-lib) versions and loaders
0.12.28+1.21.10
owo-lib-neoforge-0.12.28+1.21.10.jar
22 Nov 2025
0.12.27+1.21.10
owo-lib-neoforge-0.12.27+1.21.10.jar
21 Nov 2025
Looking for an older file? The official Modrinth project page is in Resources.