Spine exports skeleton data as readable JSON or binary .skel. re-polish supports both formats, preserves source format with Auto output, and can convert JSON to SKEL or SKEL to JSON.
Single skeleton and project workflows
Optimize one skeleton or a complete project with atlas and texture assets. Verify the exported artifact using its actual format and supported Spine version.
Output formats and size metrics
Explicit JSON produces .json; explicit SKEL produces binary .skel. File-size results can differ because text JSON and binary SKEL serialize the same data differently.
Supported versions and limitations
Supported Spine versions are 3.7 through 4.2. JSON inspection and diffing remain JSON-specific tools; binary SKEL must be decoded before structured inspection.