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SkelForm
What it is
SkelForm is a free, open-source 2D skeletal animator for games, available through a web editor and desktop versions for Linux, macOS, and Windows. Its animation tools include skeletal rigs, styles, inverse kinematics, and mesh deformation. Photoshop Document imports can create an armature: PSD groups become bones, while layers inside each group merge into a texture. Exports include sprite sheets and video. A runtime is required to use animations in games, and the site lists generic and engine runtimes; the user guide includes pygame instructions. The downloaded editor is described as a portable program without an installer, while the v0.8 release lists dedicated Windows and Mac installers. SkelForm and its documentation are works in progress. Mobile development is inactive, with no direct mobile build process; the described approach uses the web version in a WebView wrapper. The public repository uses GPL-3.0, and support is available through Discord or forums without an account.
For and against
For
- Free and licensed under GPL-3.0
- Web editor works without downloading
- Imports PSD groups as bones
- Supports inverse kinematics and mesh deformation
- Exports sprite sheets and video
Against
- A runtime is required for game use
- Documentation and software are works in progress
- Mobile development has no direct build process
- Mobile use relies on a WebView wrapper
The verdict
SkelForm offers a focused 2D rigging workflow with web access, PSD import, and game-oriented exports. Its unfinished documentation and inactive mobile development should be considered before adopting it.
Who it suits
SkelForm suits game creators who need 2D skeletal animation and PSD-based rigging. It also fits users comfortable with web editing, portable desktop software, or runtime setup.
Plans and prices
Free and open-source
Free and open-source 2D skeletal animator
Read 3 Oct 2026 · skelform.org
On the record
- Animation features
- The site lists skeletal animations, styles, inverse kinematics, and mesh deformation as features.skelform.org · read 3 Oct 2026
- Desktop availability
- The v0.8 release says SkelForm has dedicated installers for Windows and Mac.github.com · read 3 Oct 2026
- Documentation status
- The user documentation says SkelForm and its documentation are works in progress.skelform.org · read 3 Oct 2026
- Exports
- The site lists sprite sheet and video exports.skelform.org · read 3 Oct 2026
- Game runtimes
- The site says a runtime is needed to run SkelForm animations in games and lists generic and engine runtimes.skelform.org · read 3 Oct 2026
- Integrations
- The user guide includes instructions for using SkelForm animations in pygame.skelform.org · read 3 Oct 2026
- License
- The public GitHub repository identifies its license as GPL-3.0.github.com · read 3 Oct 2026
- Maker
- The site credits Retropaint as the maker.skelform.org · read 3 Oct 2026
- Mobile limitation
- The repository says mobile development is inactive and there is no direct mobile build process; it describes using the web version in a WebView wrapper.github.com · read 3 Oct 2026
- Portable download
- The installation guide describes the downloaded editor as a portable program distributed without an installer.skelform.org · read 3 Oct 2026
- PSD import
- SkelForm supports importing Photoshop Document (PSD) files to create an armature.skelform.org · read 3 Oct 2026
- PSD structure
- PSD groups become bones, and the layers within each group are merged to form its texture.skelform.org · read 3 Oct 2026
- Purpose
- SkelForm is a 2D skeletal animator designed for games.skelform.org · read 3 Oct 2026
- Support
- The site invites users to ask questions, suggest improvements, or report bugs in its Discord server or forums without an account.skelform.org · read 3 Oct 2026
- Web editor
- The site offers an editor that can be used without downloading SkelForm.skelform.org · read 3 Oct 2026
