Resize Signature to 20 KB

Most forms want the signature as a small JPG under 10 to 20 KB. A tight crop plus compression gets there.

Open the Image Compressor →

How to do it

Photograph or scan the signature on white paper.

Crop tightly and resize to the form dimensions.

Compress to JPG until it is under 20 KB.

Capture it cleanly

Sign in dark ink on plain white paper and photograph or scan it in even light. A clean, high-contrast source compresses far smaller than a shadowy phone snap.

Then

Crop tightly around the signature with a little white margin.
Resize to the form's dimensions (often around 140 x 60 pixels).
Compress to JPG and check you are under 20 KB.

Open the Image Compressor

Questions & Answers

Why is my signature file too big?

Usually because it is a full-resolution photo with a grey or uneven background. Crop tight, resize small, and shoot on clean white paper.

What format do forms want for a signature?

A JPG is accepted by almost every form. Follow the size and dimension limits the form states.

Will 20 KB keep the signature legible?

Yes, once it is cropped and resized small. The signature is simple line work, so it compresses well.

Is the tool free?

Yes, free with no watermark or account.

Other size targets

Compress JPG to 20 KB Compress JPG to 50 KB Compress JPG to 100 KB Compress Image to 200 KB Resize a Photo for an Online Form

Image to PDF JPG to PNG JPG to WEBP JPG to GIF JPG to SVG PNG to JPG PNG to Webp PNG to SVG