Resize Image in KB (Photo and Signature)
Make a photo or signature fit an exact file size, like 20 KB or 50 KB, and an exact size in pixels or centimetres, for online exam and job forms.
How to use the Resize Image in KB
Drop your photo or signature, then type the maximum size your form allows, and the minimum if it gives one. The tool finds the best quality that fits, and you download a JPG.
If the form also fixes the dimensions, choose Pixels or Centimetres and enter them. "Crop to fill" trims the edges to match the shape; "Fit on white" keeps the whole picture and adds white bars. Always check the exact sizes in your exam notification.
Frequently asked questions
How do I reduce a photo to 20 KB?
Drop the photo, set Max size to 20 KB and download the result. If the form also asks for a minimum, such as 10 KB, enter it too.
My file is below the minimum KB. What now?
Enter the minimum size. If the picture is too simple to reach it, the file is padded up to that size; the picture itself does not change.
How many pixels is 3.5 × 4.5 cm?
At 300 DPI it is about 413 × 531 pixels; at 200 DPI about 276 × 354. Choose Centimetres and the tool works it out.
Is my photo uploaded anywhere?
No. It is resized in your browser and never leaves your device.
Related tools
Every tool runs in your browser. Nothing you type or upload is sent to a server.