How to resize an image to 256x256
- Choose or drop your images above.
- Keep “Crop to fill” for an exact 256x256 result, or pick “Fit inside” to avoid cropping.
- Download the resized files individually or as a ZIP.
About 256x256 pixels
A 256x256 image is square, with an aspect ratio of 1:1, and holds 65,536 pixels in total. As a JPEG it usually lands between 7.2KB and 14KB, depending on the picture and the quality you choose.
Where 256x256 is used
A large icon size for Windows icons, app lists and avatars. It is also the biggest size stored in an ICO file.
- Save icons as PNG so edges stay sharp. Use JPG only for photo avatars.
- Check the result at its real size, not zoomed in, before you use it.
- Use a simple, bold design with a transparent background. Fine detail disappears at small sizes.
Crop to fill or fit inside?
Crop to fill always gives exactly 256x256 by trimming the edges that do not match the shape. Fit inside keeps the whole picture and scales it so neither side exceeds 256x256, which can leave one side shorter. For a typical 4:3 phone photo, crop to fill removes about 25% of the picture. A 3:2 camera photo loses about 33%, a 16:9 screenshot about 44%, and a square image about 0%.
Quality and format
Check the result before you upload
Open the finished file and check three things: the picture measures 256x256, the subject is not cut off, and the file is small enough for where you upload it. If a platform sets a size limit, run the result through the online compression tool or choose a limit such as 200KB.
A tip for this size
Save as PNG for sharp edges and transparency. Need another size? Try 300x300, 192x192, 300x250, the general image resizer, or browse every size preset.
Frequently asked questions
Why is my image not exactly 256x256?
You are probably using Fit inside, which never crops. Switch to Crop to fill for exact dimensions.
How big will a 256x256 file be?
As a JPEG, usually between 7.2KB and 14KB. Photos with lots of fine detail come out larger, and simple graphics smaller. Lower the quality for a smaller file.
Is 256x256 the right size for large icons and avatars?
It is a widely used size for large icons and avatars, but platforms and agencies change their rules. Check the current guidelines before you upload.
Will detail survive at 256x256?
At small sizes fine detail disappears. Crop in close on the main subject and use a simple, high-contrast picture for the best result.