I made myself such a tool: https://pdf.rere.re https://pdf.rere.re It's js only, nothing is sent to the server. It automatically makes the background of signat

I made myself such a tool: https://pdf.rere.re https://pdf.rere.re It's js only, nothing is sent to the server. It automatically makes the background of signatures transparent. The result is a raster pdf as if you printed, signed and scanned the document. I use it on desktop, not sure if it works well on phones.