Sometimes I use my signature in documents: PDF, emails... and I usually find the extreme dificulty to use the mouse. I decided to take advantage of the touchscreen of my phone to upload my signature to further use in my computer.
The website requires registration and works on the phone and desktop. After registration you can store your signature drawing it in a canvas with your finger. You can delete and redo your signature as much as you want and download the signature as a .png file without background.