Axion is an open-source Minecraft building toolkit inspired by Axiom, built as a Fabric client mod with a companion Paper plugin for server-backed multiplayer editing.
Axion brings fast in-game building tools directly into Minecraft with hotbar-based editing, live previews, symmetry, long-range building modes, and multiplayer-safe execution through the Paper plugin.
The Fabric mod handles the client-side tools, previews, input, config UI, and local singleplayer behavior.
The Paper plugin handles authoritative multiplayer edit application, validation, history, undo/redo, and large-operation transport.
- Hotbar Tools
MoveCloneStackSmearEraseExtrudeSymmetry
- Magic Select
- blob-style selection before point two
- configurable templates and custom masks
- searchable block picker and adjustable brush size
- Live Previews
- scrolling ghost previews
- direction arrows
- pulsing source-region visualization
- clearer first/second point markers
- Builder Modes
- replace mode
- infinite reach
- no clip
- Config and UI
- Mod Menu support
- in-game config screen
- Alt hotbar menu toggles for edit behavior
- Multiplayer Support
- server-backed edits through the companion Paper plugin
- undo/redo and validation on the server side
- Open Source
- GPL-3.0 licensed
- Magic Select Templates for custom masked selection behavior
- Better move/clone/stack/smear preview flow and scrolling visualization
- Multi-directional stack and smear previews
- Improved symmetry anchors, mirror controls, and feedback
- Alt hotbar toggles like
Keep Existing,Copy Entities, andCopy Air
- MOD-README
- Fabric mod install and usage
- PLUGIN-README
- Paper plugin install and server notes
- Wiki
- documentation, usage notes, and setup pages
| Component | Version |
|---|---|
| Minecraft | 1.21.11 |
| Fabric Mod | 1.21.11 |
| Paper Plugin | 1.21.11 |
- Fabric Loader
- Fabric API
- Fabric Language Kotlin
- Paper
1.21.11 - Matching Axion client version for players using the toolset
- Install Fabric Loader for Minecraft
1.21.11. - Put the Axion mod jar in your
modsfolder. - Install Fabric API and Fabric Language Kotlin.
- Launch Minecraft in creative mode.
- Install the Axion Fabric mod on clients.
- Install the Axion Paper plugin on the server.
- Restart the server.
- Keep the mod and plugin on matching compatible builds.
- Axion is designed around creative-mode building workflows.
- The Fabric mod by itself does not replace the Paper plugin for multiplayer server edits.
- Some newer features, especially server-backed edit behavior, are best tested with matching client and plugin versions.
- Saved hotbars and hotbar presets
- More Axiom-style builder utilities
- Expanded config and workflow customization
- More advanced selection and mask tooling