LoongBones review
A browser-based skeletal animation tool for teams targeting several game engines.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
LoongBones is a browser-based 2D animation editor for creating skeletal animations from images and armatures. It is aimed at game teams and developers who need bone-based animation, mesh deformation, and runtime data export across multiple engines. Its feature set covers bones, automatic meshing, bone weighting, free-form deformation with keyframes, inverse kinematics, animation constraints, timelines, and plugin-based export. Projects can also be exported as images or frame sequences in PNG or JPG format.
Its strongest fit is an open-runtime workflow across several game engines. LoongBones supports LoongBones and DragonBones JSON export, while its open-source runtime libraries are documented for Egret, Cocos, PixiJS, Unity, and Unreal. That combination gives teams options for integrating skeletal animation data into different engine environments rather than limiting output to a single target. Plugin-based animation data export adds another path for projects with format-specific requirements. The tool is focused on skeletal production and deformation, so teams seeking particle effects or frame-by-frame animation will need a different solution or an additional tool.
The published plans show a 7-day free trial, followed by paid monthly or annual memberships. Both paid plans include unlimited projects; the monthly plan includes 100 MB of storage, while the annual plan includes 2,000 MB. There is no permanent free plan. LoongBones is a strong choice for users who value browser access, runtime export, and open-source engine libraries, especially when a project targets Egret, Cocos, PixiJS, Unity, or Unreal. It is less suitable for teams that require a desktop application, permanent free access, particle systems, or frame-by-frame workflows.
LoongBones pros and cons
- Where it wins
- Bones, meshing, weighting, deformation, IK, and constraints
- Exports LoongBones and DragonBones JSON plus images and frame sequences
- Open-source runtimes documented for Egret, Cocos, PixiJS, Unity, and Unreal
- Where it doesn't
- No permanent free plan; access starts with a 7-day trial
- Browser-based access is listed for web only
- Does not provide frame-by-frame animation or particle effects
LoongBones fact sheet, pricing and score →
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