Using a base64 image in a PDF

You may use a data URL and an expression to embed images inline.

In the Src property use the following expression:

data:image/jpeg;base64, {{ data.imagebase64Field }}

The following is the screenshot:

How to convert an image to base64 string?

(i) Make(Formerly Integromat): Use the string function base64 to convert an image to a base64 string.

(ii) Zapier: Use Javascript or Python code to convert an image to a base64 string