Multi-file input
Add a sequence of transparent PNG or WebP frames.
Free developer utility
Sprite Sheet Packer
Pack multiple sprite frames into one compact atlas and export matching JSON metadata.
Free0 creditsPNG atlas + JSON
LIVE WORKSPACE
Work locally. Export cleanly.
This utility runs in your browser. Your files stay on your device and no generation credits are used.
Source & settings01
Private local processing0 credits
Add two or more frames
The utility runs locally. Your artwork is not uploaded and no credits are used.
01 / WHY IT WORKS
Made for production, not just previews.
Predictable layout
Use a fixed-column grid with consistent cell dimensions.
Metadata included
Export frame names, coordinates, and dimensions as JSON.
From source to clearly labeled output.
Add frames
Select your animation or asset PNG files in sequence.
Choose columns
Set the atlas layout and inspect the generated preview.
Export both files
Download the atlas PNG and its JSON coordinates.
Does the sprite sheet packer upload my frames?
No. Frames stay in the browser. You get a PNG atlas plus JSON with x, y, width, and height for every file.
03 / FAQ
Clear terms before you build.
Are my frames uploaded?
No. Packing runs in your browser and the files stay on your device.
What JSON format is used?
The export contains an image name, atlas dimensions, and a frame object with x, y, width, and height for every file.
Does it trim transparent pixels?
The free grid packer preserves the original frame bounds. Smart trimming is a Studio export option.