Why Are My Base64‑Encoded Images Failing to Render in the PDF Output?

Start by checking that your Base64 image is correctly embedded in the HTML. The correct format should be:

<img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAUA..." />

Make sure that:

The src attribute starts with data:image/png;base64, (or image/jpeg for JPEGs).
The Base64 string is complete, with no missing or extra characters.
There are no line breaks, spaces, or formatting issues in the string.