Resize Image to 1024×1024
Resize to 1024×1024 to match the master icon size Apple requires for App Store submissions and the default output of most AI image generators. It is a clean power-of-two square (1024 = 2^10), which is why so many icon pipelines and machine-learning models settle on it. One high-res 1024 master can be downscaled to every smaller icon slot.
Drag & drop a file here, or click to choose
The icon and AI master
iOS asks for a 1024×1024 App Store icon, and Xcode generates every smaller size from that single file. Starting at the correct master resolution means no icon slot ends up blurry.
It is also the native canvas of many text-to-image models, so touched-up AI art is often kept at 1024×1024. Editing and resizing here happens on your device, keeping generated or in-progress artwork off external servers.
Why powers of two matter
1024 is 2 to the 10th power, which lets graphics hardware and mipmapping halve it cleanly to 512, 256, 128 and down. That clean division keeps downscaled avatars and game textures crisp.
Because it is a 1:1 square, any non-square source needs a center crop. For an app icon, avoid placing detail in the corners since iOS rounds them with a mask.
How to use Resize Image to 1024×1024
- 1Drop an image into the box above, or click to choose one (JPG, PNG or WebP).
- 2The target size 1024×1024 is pre-loaded — adjust it if you need a variation.
- 3The result updates live; download it when it looks right.
Frequently asked questions
Why does the App Store require a 1024×1024 icon?
Apple uses that single high-resolution master to generate every smaller icon size shown on devices and in the store, so the source must be exactly 1024×1024 with no transparency.
Is 1024×1024 a good size for AI-generated images?
Yes, it is the native output of many diffusion models. Keeping edits at 1024×1024 preserves the model's full detail before any downscaling.
Should my 1024×1024 icon have rounded corners?
No. Submit a square image with sharp corners; iOS automatically applies its rounded-rectangle mask, so pre-rounding causes visible gaps.