Sprite2GIF • Background • Manifest Builder

Load an Atlas JSON (upload, URL, or paste).
(Optional) Provide a Sprite Sheet (upload or URL). If empty, we use meta.image from the atlas (data URIs supported).
Click Preview. Change FPS any time — preview updates live.
Make GIF (transparent) or PNG Strip, then Add Sprite to Manifest.

If omitted, we try atlas.meta.image. If the atlas URL is set, relative filenames resolve against it.

Animation (atlas.animations)

FPS

Loop

Kind

ID (auto from filename/atlas) — locked

Label (auto‑formatted)

Scale

Facing

Atlas must include frames (array or map). Optional animations can be names or indices.
All frames in an animation must be the same width × height.
Transparent pixels preserved for PNG; GIFs use a transparent color index.
Recommended frame sizes: 32×32, 48×48, 64×64, or your tile size.

Give the background an ID and Label (ID auto-locks from first layer).
Click Add Layer for each PNG (upload or URL).
Adjust each layer’s speed. Use Apply to All to set defaults.
Preview Parallax → Add Background to Manifest → (optional) Export Flattened PNG.

Label

Preview Size

Export Size

Default Speed

Layers export as game-assets/backgrounds/<ID>/layer0.png, layer1.png, …

Export width should be a multiple of the preview width (e.g., 5760×1080 for a 1920×1080 scene).
Each layer should tile horizontally (seamless edges) for smooth looping.
Start speeds from 0.05 (far) to 0.6 (near). Tune to taste.
Manifest requires layers.length === speed.length (the tool validates for you).

Set ID

Set Label

Members (comma-separated IDs)

Run a quick sanity preview if something won’t load.