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SkelForm

skelform.org

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Spec score 7.8 #26 of 48 in 2D Character Animation Software

What it is

SkelForm is a free 2D skeletal animator designed for game animation. It offers a web editor that works without a download, as well as desktop availability for Linux, macOS and Windows. Listed animation features include styles, inverse kinematics and mesh deformation. SkelForm can import Photoshop Document files to build an armature: PSD groups become bones, while layers inside each group are combined into a texture. Exports include sprite sheets and video. A runtime is required to use SkelForm animations in games; the site lists generic and engine runtimes, and its guide covers using animations in pygame. The installation guide describes the downloaded editor 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 option is to use the web version in a WebView wrapper. Its public repository lists a GPL-3.0 license.

Spec sheet

Purpose
SkelForm is a 2D skeletal animator designed for games.Read 3 Oct 2026 · skelform.org
Integrations
The user guide includes instructions for using SkelForm animations in pygame.Read 3 Oct 2026 · skelform.org
Support
The site invites users to ask questions, suggest improvements, or report bugs in its Discord server or forums without an account.Read 3 Oct 2026 · skelform.org
License
The public GitHub repository identifies its license as GPL-3.0.Read 3 Oct 2026 · github.com
Maker
The site credits Retropaint as the maker.Read 3 Oct 2026 · skelform.org
Animation features
The site lists skeletal animations, styles, inverse kinematics, and mesh deformation as features.Read 3 Oct 2026 · skelform.org
Desktop availability
The v0.8 release says SkelForm has dedicated installers for Windows and Mac.Read 3 Oct 2026 · github.com
Documentation status
The user documentation says SkelForm and its documentation are works in progress.Read 3 Oct 2026 · skelform.org
Exports
The site lists sprite sheet and video exports.Read 3 Oct 2026 · skelform.org
Game runtimes
The site says a runtime is needed to run SkelForm animations in games and lists generic and engine runtimes.Read 3 Oct 2026 · skelform.org
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.Read 3 Oct 2026 · github.com
Portable download
The installation guide describes the downloaded editor as a portable program distributed without an installer.Read 3 Oct 2026 · skelform.org
PSD import
SkelForm supports importing Photoshop Document (PSD) files to create an armature.Read 3 Oct 2026 · skelform.org
PSD structure
PSD groups become bones, and the layers within each group are merged to form its texture.Read 3 Oct 2026 · skelform.org
Web editor
The site offers an editor that can be used without downloading SkelForm.Read 3 Oct 2026 · skelform.org

Plans and prices

Free and open-source Free Free and open-source 2D skeletal animator Read 3 Oct 2026 · skelform.org

Every SkelForm plan and price →

Strong points and limits

Strong points

  • Web editor works without a download
  • Includes inverse kinematics and mesh deformation
  • Imports PSD groups as bones
  • Exports sprite sheets and video
  • Public repository lists a GPL-3.0 license

Limits

  • A runtime is required to use animations in games
  • Documentation and software are works in progress
  • Mobile development is inactive
  • No direct mobile build process

Who it suits

SkelForm suits game creators who need 2D skeletal animation tools and can work with a required runtime. It also suits users who prefer a browser editor or desktop software on Linux, macOS or Windows.

Verdict

SkelForm provides skeletal animation tools, PSD armature import and game-runtime options across web and desktop. Its work-in-progress status and lack of a direct mobile build are important constraints.

Where Specifiction places it

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