Facebook displays profile photos at several sizes depending on context and 320x320 is the size at which it stores the uploaded version before scaling down for smaller display slots. Uploading a profile photo at exactly this size means Facebook is working from an image that already matches its stored version rather than scaling up from something smaller or cropping down from something larger. Spotify artist profile photos also use square dimensions around this range for certain display contexts. Having a clean centered square at 320x320 covers both use cases without needing separate files for each platform.
How to Resize an Image to 320x320
Enter 320 in both the width and height fields. Turn the Maintain Aspect Ratio checkbox off for a forced square output. With it on and a non-square original, the output dimensions will not both equal 320. Turning it off forces both sides to exactly the same value.
For profile photos, centering the subject with some breathing room on all sides gives the best result when the image is displayed at various smaller sizes across different parts of a platform. A tight crop that works at 320x320 often looks badly framed when the platform reduces it further for a thumbnail display. Upload multiple images at once and download as a ZIP when done.
Common Uses for 320x320 Images
Facebook profile photos are stored at 320x320 after upload. Preparing the image at this size before uploading gives Facebook the exact resolution it wants to work from rather than letting it scale or crop a different size. This generally produces a sharper result in the profile display and in thumbnail views across the platform.
Spotify artist images, podcast cover thumbnails in smaller display contexts and certain app store listing screenshots that include profile-style images also land around this dimension.
Output Format at This Size
JPEG works fine for portrait photos and profile images at 320x320. PNG is the better choice if the image has a custom or transparent background, or if it contains graphic elements where clean edges matter. The file size difference between the two at this dimension is small enough that the format decision should be based on content type rather than storage concerns.