SpineViewer

中文 | English

A WYSIWYG Spine file viewer & exporter.

Features

• Supports multiple Spine file versions
• Drag & drop or copy/paste to open files in batch
• List-based skeleton view with render layer management
• Multi-select list to batch-adjust skeleton parameters
• Multi-track animation support
• Skin / custom slot attachment configuration
• Debug rendering mode
• Fullscreen preview
• Export to single-frame image, animated GIF/WebP/AVIF, video formats
• Batch export at multiple resolutions
• Custom FFmpeg export parameters
• …and more

Spine Version Support

Version	View & Export	Format Conversion	Version Conversion
2.1.x	✅
3.6.x	✅
3.7.x	✅
3.8.x	✅	✅
4.0.x	✅
4.1.x	✅
4.2.x	✅	✅
4.3.x

More versions coming soon 🚀🚀🚀

Supported Export Formats

Export Format	Use Case
Single Frame	Generate high‑resolution still images; pick any frame manually.
Frame Sequence (PNG)	Lossless PNG sequences with alpha channel preserved.
GIF / WebP / AVIF	Perfect for quick animated previews.
MP4	The most widely compatible video format.
WebM	Browser‑friendly streaming with optional transparency.
MKV / MOV	For those who like to tinker.
Custom FFmpeg Command	Use any FFmpeg arguments for complex, tailored export workflows.

Installation

1. Go to the Releases page and download the ZIP.
2. Make sure you have the .NET Desktop Runtime 8.0.x installed.
3. Alternatively, download the SelfContained ZIP, which runs standalone without any .NET prerequisites.
4. To export GIF or other video formats, install the ffmpeg CLI and add it to your PATH.
   • Windows builds: see the FFmpeg download page
   • Direct download: ffmpeg-release-full.7z

Usage

Importing Skeletons

You can import Spine skeletons in three ways:

• Drag & drop or paste skeleton files or folders onto the model list.
• Use File > Open to batch‑open multiple skeleton files.
• Use File > Open Single Model to open one at a time.

Adjusting Content

• Right‑click menu and keyboard shortcuts are available in the model list. You can multi‑select to adjust parameters in batch.
• In the preview pane, you can also use mouse controls:
  • Left‑click & drag to move a model; hold Ctrl to multi‑select (synced with the list).
  • Right‑click & drag to pan the entire scene.
  • Mouse wheel to zoom; hold Ctrl to zoom all selected models proportionally.
  • “Render Selected Only” mode shows only the selected models in preview; use the list to change selection.

Below the preview, playback controls let you scrub through the timeline like a basic player.

Exporting Content

Exports follow the “what you see is what you get” principle—your real‑time preview is exactly what gets exported.

Key export options:

• Render Selected Only: includes only the selected models in both preview and export.
• Output Folder: if unspecified, exports go into each model’s source folder; otherwise, everything exports to the chosen folder.
• Export Single: by default, each model is exported separately; enable this to render all selected models together into a single output.
• Auto Resolution: ignores preview resolution and viewport size—exports at the content’s actual bounds; for animations, matches the full animation area.

More

Detailed usage and advanced tips are in the Wiki.
Encounter a bug or have a feature request? Open an Issue.

Acknowledgements

• spine-runtimes
• SFML.Net
• FFMpegCore

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