How to resize an image to 400x400
- Choose or drop your images above.
- Keep “Crop to fill” for an exact 400x400 result, or pick “Fit inside” to avoid cropping.
- Download the resized files individually or as a ZIP.
About 400x400 pixels
A 400x400 image is square, with an aspect ratio of 1:1, and holds 0.16 megapixels. At 300 DPI it would print at about 1.3 x 1.3 inches (3.4 x 3.4 cm). As a JPEG it usually lands between 18KB and 35KB, depending on the picture and the quality you choose.
Where 400x400 is used
A widely used profile picture size on LinkedIn, X and many forums. Platforms show it in a circle or small square, so a centred subject works best.
- Keep key text and faces away from the edges, because apps crop and place buttons near them.
- Check the platform help page before you upload. Recommended sizes change from time to time.
- Export from your editor at exactly this size, so the platform does not recompress and blur the picture.
Crop to fill or fit inside?
Crop to fill always gives exactly 400x400 by trimming the edges that do not match the shape. Fit inside keeps the whole picture and scales it so neither side exceeds 400x400, 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 400x400, 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
Crop to a centred face, because the circle mask cuts the corners. Need another size? Try 500x500, 512x512, 600x600, the general image resizer, or browse every size preset.
Frequently asked questions
Why is my image not exactly 400x400?
You are probably using Fit inside, which never crops. Switch to Crop to fill for exact dimensions.
How big will a 400x400 file be?
As a JPEG, usually between 18KB and 35KB. Photos with lots of fine detail come out larger, and simple graphics smaller. Lower the quality for a smaller file.
Is 400x400 the right size for profile pictures?
It is a widely used size for profile pictures, but platforms and agencies change their rules. Check the current guidelines before you upload.
Will detail survive at 400x400?
At small sizes fine detail disappears. Crop in close on the main subject and use a simple, high-contrast picture for the best result.