Signature POSTer: Post a Signature Image to a URL

Capture your drawn signature image as a transparent .png, encode it into base64, and HTTP POST the result to an endpoint of your choosing. The POST body will contain the following parameters:
{
'source': 'SignaturePOSTer'
'imageData': ...
}

The 'imageData' entry will contain a base64 encoded string representing your transparent .png signature.

Perfect for businesses looking to integrate a signature solution into their existing forms products, or as an developer tool.