Get Sample Signature Image Jpg Pictures. Once downloaded you may want to keep the file on your computer (or save in an online storage service like dropbox). Just put your sign in paint area in tool and click save button to download your signature image.

html - Capture Signature using HTML5 and iPad - Stack Overflow
html - Capture Signature using HTML5 and iPad - Stack Overflow from i.stack.imgur.com
If you are not familiar with data uri scheme on the server side you can use e.g. Colour range tool & minimum tool. Sample image is given below:

Currently there are 53 image formats supported.

On my mac i have an image added to my signature on mac os high sierra. Uploading an image on signeasy for ios goes like this: Follow the same process to save your initials. Create electronic signatures online by drawing it on any computer, tablet, or mobile device.