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Resize a Signature to 20 KB

Shrink a photo of your signature to under 20 KB, for forms with the strictest signature upload limit.

Your files are processed on your device and are never uploaded.

About this tool

Many online forms ask for a signature image under a very small size, such as 20 KB, separately from your photo. This page opens Resize image with the target already set to 20 KB, ready for a photo or scan of your signature.

How to use it

  1. Choose a photo or scan of your signature, or drop it onto the box.
  2. The maximum file size is already set to 20 KB.
  3. Select Resize and download the result once it fits.

When this is useful

  • Job and admission portals with a separate, small signature upload field.
  • Exam registration forms that ask for a signature under 20 KB.
  • Bank and government forms with strict signature size rules.

Tips for best results

  • If you do not have a photo of your signature yet, draw one with the Signature maker tool and save it as a transparent PNG first.
  • Sign on plain white paper in dark ink, then photograph it in good light for the cleanest result.
  • Crop the photo tightly around the signature before resizing, so the detail is not wasted on empty space.

Good to know

A signature has far less detail than a full photo, so it usually reaches 20 KB with little visible quality loss, as long as the original photo is reasonably sharp and well cropped.

Your files stay with you

This tool opens and changes your image inside your own browser. It is never uploaded.

Guides

Questions and answers

Should my signature have a white or transparent background?

Either works for a size limit. For a cleaner look on forms, use the Signature maker to create a transparent PNG, though a JPG with a white background is usually accepted too.

Why is my signature photo so much larger than 20 KB to start with?

A phone camera photo captures the whole page at high resolution, including empty space around the signature. Cropping tightly before resizing helps a lot.

Can I use this for an initial as well as a full signature?

Yes, the tool works the same way for any small image, including initials or a stamp.

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