Sprite Atlas Studio
Build a compact atlas from your own animation frames. Keep trim offsets, rotation, borders and frame order visible so the image and engine data stay in agreement.
How we build a check
This workbench processes supported inputs locally. We test calculations, file structure and generated artifacts using independent readers or known fixtures where available. The example runs the same processing path as a supplied input; it does not stand in for checking your own result.
Editorial responsibility
KitForma maintains this tool and its guides. The source notes on the tool page link to the supporting documentation. We do not claim affiliation with the referenced hardware manufacturers or platforms. Review date: 2026-10-19.
Limits and updates
1–128 individual PNG/JPEG files; at most 4 MiB each, 20 MiB combined, 2048 pixels per input edge and 4,194,304 decoded source pixels total. One atlas up to 2048 × 2048. Animated PNG, GIF, WebP, SVG and video input are unsupported. No resizing, multiple atlas pages, mipmaps, polygon packing or preservation of original color profiles/EXIF. Browser Canvas and CompressionStream support are required. Packing is heuristic and does not guarantee the mathematically smallest atlas. If a specification changes or a result appears incorrect, send the relevant source URL and a non-sensitive reproduction to kitforma@outlook.com.
Open-source components
The tools use self-hosted open-source components appropriate to each format, including PDF.js, pdf-lib, fflate, SheetJS, MediaInfo by MediaArea.net SARL and others. Component versions and licenses. MediaInfo license · fflate license.