iOS Icon Sizes — Current Source Workflow Checker
Check an image size against current 1024px iOS and iPadOS icon source workflows, with separate flat appearance and Icon Composer guidance.
Check the source dimensions for the current iOS and iPadOS app icon workflows. Apple supports a single high-resolution bitmap in an Xcode asset catalog and a layered Icon Composer design. This tool focuses on their 1024-pixel source canvas, so an old list of device-specific exported sizes is not presented as a current universal requirement.
How to use this tool
- Choose the flat appearance or Icon Composer source workflow.
- Enter the pixel width and height of your existing artwork.
- Read whether the dimensions match, need resizing, or first need a square composition.
- Use the preparation table and the linked Apple documentation before importing the asset.
Formula
Width scale = 1024 / source width; height scale = 1024 / source height
Scale factors describe dimensions only. Different width and height factors indicate that direct stretching would distort the artwork; crop or pad to a square instead. The checker does not read or convert an image file.
Example
A 512 × 512 source needs a factor of 2 in both directions to reach 1024 × 1024. This adds pixels through resampling, not design detail. A 2048 × 1024 source has factors 0.5 and 1, so its composition should be squared before resizing.
Frequently asked questions
Do I still need every old iPhone icon size?
The current Single Size asset-catalog workflow lets Xcode generate variants from one source. You can still use All Sizes for deliberate per-size artwork; this page is not that legacy/manual slot table.
Are the appearances identical?
No. The Any image uses an opaque square, the separate dark bitmap can use a transparent background, and tinted artwork is grayscale. A size match does not verify any of these design properties.
Is a PNG the same as an Icon Composer file?
No. A 1024px PNG can be flat artwork or a layer input. Icon Composer combines layers, effects and appearances into its own file and previews how the system renders them.
Sources
Last updated: 2026