Kinetra2D vs SpineBones

Kinetra2D is a web-based workspace for rigging artwork, animating 2D scenes and exporting projects for PixiJS. Users can build bone hierarchies, pose characters, edit meshes and control attachment vertices. Animation tools include keyframes, easing, playback, clips and a dedicated timeline. AI animation generation can supply motion starting points for further manual refinement. PixiJS is the only supported export engine; a downloadable ZIP can include skeleton JSON, atlas PNG and JSON files, and sounds for a scene or project. Scenes can be organized in a cloud workspace, with capacity depending on the plan. The Free plan includes three projects per workspace and one scene per project, with community support. Pro costs $12 a month, billed monthly, and includes 50 projects per workspace, 10 scenes per project and up to 50 cloud projects. Team costs $20 a month, billed monthly, with a two-seat minimum; Studio costs $32 a month, billed monthly. Paid tiers start with a no-charge 14-day trial that requires no payment method. Locally saved Animator projects stay in the browser unless users send project data to an account feature.

SpineBones is a free 2D skeletal animation editor for creating bone rigs, keying motion, and exporting animations. Rigging includes hierarchies, re-parenting, grouping, and inverse kinematics. Its timeline supports keyframe insertion, movement, selection, copying, looping, per-key easing, and audio tracks. Slots accept PNG, JPG, SVG, and WebP artwork, with multiple attachments and frame-by-frame swaps. Attachment meshes can be deformed with keyed vertices, and onion skin shows neighboring poses. SETUP stores the base pose; ANIMATE keys position, rotation, and scale. Exports include WebM video, transparent PNG sequences, sprite sheets with atlas data, and portable .sbn packages; legacy .json projects open too. An MCP bridge supports Claude and other MCP clients for rig elements, keyframes, frame-rate changes, and exports. It runs on macOS 12+ and Windows 10+, with no account, licence key, or trial timer.