How to clean a signature image for document use.

A signature file is most useful when the page behind it disappears and only the actual ink remains. This guide explains how to think about signature cleanup and what inputs create better results.

Capture matters

Dark ink on white paper with even lighting makes background removal easier and cleaner. Bad shadows and low contrast make any cleanup tool less reliable.

Use transparent export

Transparent export is usually the most useful final format because it lets the signature sit naturally inside PDFs, docs, and form builders.

Reader questions

Can I use a phone photo of my signature?

Yes, but crop tightly and avoid heavy page shadows for cleaner results.