Resize an image to 20 KB
Twenty kilobytes is the most common signature limit on application forms, and it often appears in the same upload step as a larger limit for the photograph. If your form lists two boxes with two different numbers, this is usually the smaller one. A tightly cropped head-and-shoulders photo can also reach 20 KB and still be recognisable, which 10 KB cannot.
No images yet. Add a photo and set the size you need.
Forms usually ask for two files, not one
Exam and admission portals typically want a photograph and a signature uploaded separately, each with its own size limit. A pattern you will see often is a larger allowance for the photo and around 20 KB for the signature. Prepare them as two separate files and resize each to its own limit. Using one number for both is the mistake that causes most re-uploads.
What 20 KB looks like for each
- A signature: comfortable. There is room for clean, solid strokes with no visible blockiness.
- A passport-style head and shoulders crop: workable. The face stays recognisable, though fine detail in hair and background softens.
- A full-length or group photo: not realistic. Crop to the person first.
- A document or ID card scan: no. Text stops being readable well before 20 KB.
Check the format and the minimum too
Many portals accept JPG only, which is what this tool produces, so that part is handled. What catches people out is a stated minimum. A form reading "between 10 KB and 20 KB" rejects a 6 KB file just as firmly as a 60 KB one. If your result lands far below the limit, raise the size slightly rather than submitting the smallest file you can make.
Steps
- Choose your photo or signature file.
- The limit on this page is already 20 KB.
- Look at the size shown beside the image and confirm it is still clear.
- Press Download, then repeat for your second file if the form needs one.
Questions
My form wants a 50 KB photo and a 20 KB signature. How do I do both?
Resize them one at a time. Do the signature here at 20 KB, then open the 50 KB page for the photograph. They are separate uploads, so they need separate files.
Will a passport-size photo still be clear at 20 KB?
If you crop to head and shoulders first, yes, it stays recognisable. Keeping a lot of background in the frame is what makes it look blurry at this size.
The form says my file is too small. Why?
Some forms set a minimum as well as a maximum. Type a slightly higher number, such as 18 or 19, so the result sits just inside the range instead of far below it.