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10 KB signature compressor

Compress a signature to 10 KB online.

Shrink a scanned or photographed signature for an online form without sending the original image to a server.

Target size 10 KB
Maximum file size

Output: JPG
The tool keeps the original proportions and fills transparent areas with white.

Make a signature file fit a 10 KB field.

Signature uploads often have two separate rules: a maximum file size and a required width or height. This tool handles the file-size part by producing a small JPG and showing you its final dimensions.

How to reduce a signature to 10 KB

  1. Choose a clear scan or photo of the signature.
  2. Set the target to 10 KB.
  3. Click Compress image and wait for the result.
  4. Download the JPG and compare its dimensions with your form’s instructions.

Prepare the signature before compressing it

Crop empty space around the handwriting first if the form permits it. A tightly cropped image gives the tool fewer unnecessary pixels to encode and may look clearer at the same file size. Keep a copy of the original scan in case the portal requires a different format.

Important: file size and dimensions are different

A 10 KB file can still have the wrong width or height for a particular application. The tool does not assume a portal’s rules. Use the exact pixel or aspect-ratio requirements printed beside the upload field.