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[Beta] re-polish: Tool for optimizing Spine exports and reducing file size

maxsokal

Hi everyone!

I've been working on a tool called re-polish, and I'd love to share the public beta with the community to get some feedback.

In my own animation practice, I frequently encountered optimization challenges, file cleanup issues, and asset repacking workflows. I started thinking about how to improve these processes and ended up building a node-based tool system to address them.

What is re-polish?
It's a standalone tool designed to take a ready Spine export (JSON) and optimize it without needing to send tasks back to the animation team or open the Spine editor manually.

Key features:

Cleanup: Automatically removes redundant animation keys without visual loss.

Curve Optimization: Replaces insignificant Bézier curves with linear segments to improve runtime performance.

Size Reduction: Rounds data and removes invisible attachments/unused properties.

Validation: Detects non-English characters that often cause engine crashes.

Atlas Management: Supports atlas unpacking, asset filtering, rescaling, and repacking.

Visual Comparison:
The tool includes a "Dual Viewer" to compare the original vs. optimized skeleton side-by-side with an FPS counter, so you can verify nothing broke visually.

Try it out:
The public beta is currently live here: re-polish.com

I would really appreciate any feedback, bug reports, or feature requests from fellow Spine users. Does this fit into your pipeline?

Thanks!

Harald

@maxsokal Thanks for sharing, your tool looks really nice indeed!

maxsokal It's a standalone tool designed to take a ready Spine export (JSON) and optimize it without needing to send tasks back to the animation team or open the Spine editor manually.

Please note that using JSON as export format instead of binary (.skel) format is much more wasteful in terms of space and load times.

maxsokal Cleanup: Automatically removes redundant animation keys without visual loss.

Please note that enabling Animation clean up during export or manually running Clean Up at animations also removes redundant keys. If you need to keep keys identical to the setup pose (for animations used on higher tracks), you can enable Layered at these animations to preserve setup-pose keys as well.

maxsokal

Harald Thank you for your feedback.