Officially released
Officially released, free for long-term use, with basically all the features of Spine, and supports exporting Spine-related data.
Free Forever · Built for 2D Games
A cloud-based skeletal animation editor designed for 2D games. Intuitive and easy to learn, with precision bone and mesh editing, plus support for IK, physics, and other constraints. Timeline-based keyframe animation, Spine data import/export in JSON and SKEL formats, and GIF / MP4 export. Create in Bone3, deploy with the official Spine Runtime.
Everything from rigging to export
Cloud & Reuse
Cloud storage, one-click project duplication, quick skin image swap preview
Multi-format Export
SPINE JSON/SKEL data with atlas, GIF animation, MP4 video
Weight Binding
Weighted bone binding and mesh vertex weight editing
Constraints
Physics, IK, path, and transform constraints
Bone Operations
Rotate, move, scale, and skew bones
Bone Elements
Bones, slots, plain images, mesh images, paths, point elements
Image Operations
Rotate, move, scale, mesh edit, outline, create, deform
Draw Order
Drag to adjust the draw order
Skin Grouping
Quick skin grouping adjustments
Events & Audio
Keyframe event callbacks and audio binding preview
Multi-animation
Manage multiple animations in parallel
Batch Replace
Batch processing and replacement across image groups
Auto Keyframes
Automatic keyframe generation
Multi-track
Parallel multi-track animation editing
Keyframe Batch
Batch keyframe operations
Easing Curves
Easing presets and custom bezier curve tuning
Spine data exported from the editor (JSON / binary) works directly with official Spine runtimes, covering mainstream 2D game engines and web runtimes.
Spine 4.2 / 3.8 data formats · Official runtime ecosystem
Unity
Cocos2d-x
Cocos Creator
Unreal Engine
PixiJS
LayaAir
Godot
Defold
HTML5 / spine-ts
Track the latest progress on product capabilities, editing workflows, and export support.
Learn how to design a game animation state machine with clear states, transitions, interruption rules, animation events, layered blending, and reliable tests.
游戏动画状态机负责根据角色状态选择、切换和混合动作。本文从状态划分、过渡条件、打断优先级、动画事件、分层混合和调试验收六个方面，说明如何解决角色动作卡顿、乱跳、重复触发与收招困难等问题。
Compare skeletal animation vs. frame-by-frame animation in games: key differences, pros and cons, performance trade-offs, and how to choose the right workflow.
