How to resize an image to 320x50
- Choose or drop your images above.
- Keep “Crop to fill” for an exact 320x50 result, or pick “Fit inside” to avoid cropping.
- Download the resized files individually or as a ZIP.
About 320x50 pixels
A 320x50 image is landscape, with an aspect ratio of about 6.40 to 1, and holds 16,000 pixels in total. At 300 DPI it would print at about 1.1 x 0.2 inches (2.7 x 0.4 cm). As a JPEG it usually lands between 1.8KB and 3.5KB, depending on the picture and the quality you choose.
Where 320x50 is used
The standard mobile banner size placed at the top or bottom of phone screens.
- Avoid small text near the edges, where profile pictures and buttons can cover it.
- Keep the file light. A banner of a few hundred KB loads fast and is rarely rejected.
- Put the important part in the centre. Apps crop banners differently on phones and desktops.
Crop to fill or fit inside?
Crop to fill always gives exactly 320x50 by trimming the edges that do not match the shape. Fit inside keeps the whole picture and scales it so neither side exceeds 320x50, which can leave one side shorter. For a typical 4:3 phone photo, crop to fill removes about 79% of the picture. A 3:2 camera photo loses about 77%, a 16:9 screenshot about 72%, and a square image about 84%.
Quality and format
Check the result before you upload
Open the finished file and check three things: the picture measures 320x50, 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
Text must be very short at this height. One short phrase works best. Need another size? Try 728x90, 1128x191, 970x250, the general image resizer, or browse every size preset.
Frequently asked questions
Why is my image not exactly 320x50?
You are probably using Fit inside, which never crops. Switch to Crop to fill for exact dimensions.
How big will a 320x50 file be?
As a JPEG, usually between 1.8KB and 3.5KB. Photos with lots of fine detail come out larger, and simple graphics smaller. Lower the quality for a smaller file.
Is 320x50 the right size for mobile banner ads?
It is a widely used size for mobile banner ads, but platforms and agencies change their rules. Check the current guidelines before you upload.
Will detail survive at 320x50?
At small sizes fine detail disappears. Crop in close on the main subject and use a simple, high-contrast picture for the best result.