How to resize an image to 100x100
- Choose or drop your images above.
- Keep “Crop to fill” for an exact 100x100 result, or pick “Fit inside” to avoid cropping.
- Download the resized files individually or as a ZIP.
About 100x100 pixels
A 100x100 image is square, with an aspect ratio of 1:1, and holds 10,000 pixels in total. As a JPEG it usually lands between 1.1KB and 2.2KB, depending on the picture and the quality you choose.
Where 100x100 is used
A very small square used for thumbnails in lists, comments and tables.
- Start from the largest original you have. Enlarging a small picture makes it look soft.
- Use JPG for photos and PNG for graphics with text or transparency.
- A square crop keeps the centre of the photo, so frame the subject in the middle.
Crop to fill or fit inside?
Crop to fill always gives exactly 100x100 by trimming the edges that do not match the shape. Fit inside keeps the whole picture and scales it so neither side exceeds 100x100, 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 100x100, 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 in close on the subject, because there is little room for detail. Need another size? Try 96x96, 120x120, 128x128, the general image resizer, or browse every size preset.
Frequently asked questions
Why is my image not exactly 100x100?
You are probably using Fit inside, which never crops. Switch to Crop to fill for exact dimensions.
How big will a 100x100 file be?
As a JPEG, usually between 1.1KB and 2.2KB. Photos with lots of fine detail come out larger, and simple graphics smaller. Lower the quality for a smaller file.
Is 100x100 the right size for tiny thumbnails and list pictures?
It is a widely used size for tiny thumbnails and list pictures, but platforms and agencies change their rules. Check the current guidelines before you upload.
Will detail survive at 100x100?
At small sizes fine detail disappears. Crop in close on the main subject and use a simple, high-contrast picture for the best result.