Export metadata

Open from Cut / Merge, or import JSON.

Import JSON

Image

Format

Frames: 0

View

Show grid

No frame data yet.

How to use

The Metadata tool generates JSON or XML atlas files listing each frame’s name, position, and size on a spritesheet PNG. Use output in game engines, Starling, Sparrow, or custom loaders.

Load frame data

From Cut or Merge: click Open Metadata — frame list and sheet size load automatically.
Import JSON: select a spritesheet JSON from Spine Preview export (enable Spritesheet JSON).
Confirm Frames count is greater than zero.

Configure & export

Image — PNG filename referenced in metadata (must match your project file).
W and H — total sheet pixel size; must exactly match the PNG.
Choose JSON (TexturePacker-style) or XML (Starling/Sparrow).
Click Download metadata.

Output formats

JSON includes image path, sheet size, and frames with x, y, w, h, name. XML uses <TextureAtlas> and <SubTexture> entries.

FAQ

Why must W×H match the PNG?: Wrong dimensions cause incorrect UV cropping in your engine.
Same as Spine .atlas?: No — this is generic sprite sheet JSON/XML, not Spine skeleton atlas format.
Can I edit frame names?: Names come from the source tool. Re-import or regenerate from Cut/Merge if needed.

Spritesheet metadata

JSON (TexturePacker-style) or XML (Starling / Sparrow atlas). Sheet W×H should match your PNG.