Nerulio.
All toolsStudioNo upload · processed on this device

Sprite Lab

Slice, align, animate, set pivots and hitboxes and pack an atlas — one sheet, one screen.

Drop image files hereProcess many files at once
No upload · processed on this device

Sprite Lab

Slice, align, animate, set pivots and hitboxes and pack an atlas — one sheet, one screen.

How it works

  1. Add images
  2. Adjust settings and review the result
  3. Download a new file

Supported formats

PNG / JPG / WebP / AVIF / HEIC → PNG + JSON (ZIP) — Input decoding depends on browser support and optional engines.

What this tool does

Slice, align, animate, set pivots and hitboxes and pack an atlas — one sheet, one screen.

Implementation and verified quality

advanced · Studio Sprite workspace: measured grid (margin, spacing) or alpha islands, colour key, previewed import decisions; GIF/APNG/.aseprite decoders; timeline, pivots, boxes, alpha contour collision. Quality qualification is in progress. Pro/Flagship quality has not been established.

Before you export

Detached parts are merged by distance. Overlapping characters are not semantically separated, rotated packing is not supported, and the Unity importer is UNVERIFIED.

Frequently asked questions

What are this tool’s limitations?

Detached parts are merged by distance. Overlapping characters are not semantically separated, rotated packing is not supported, and the Unity importer is UNVERIFIED.

Are my files uploaded?

Nerulio processes selected files on your device and has no file-upload API. Optional engines and models are downloaded from third parties; those requests expose connection information such as your IP address.

Will my work be saved automatically?

No. Images and editing state stay in this tab; media output can use local temporary storage. Changing language preserves your work; reloading, closing the tab, or following a link to another page can clear it.