Aspose.HTML doesn’t appear to support images embedded via base64 encoding when converting to PDF. The HTML example below and the attached PDF output from HTML Converter - Convert HTML to PDF, DOCX, images online for free demonstrates this…
<!DOCTYPE html>
<html>
<head>
<title>Aspose.HTML base64 img issue</title>
</head>
<body>
<p>
A red dot base64 encoded img...
</p>
<div>
<img src="data:image/png;base64,%20iVBORw0KGgoAAAANSUhEUgAAAAUA%20AAAFCAYAAACNbyblAAAAHElEQVQI12P4//8/w38GIAXDIBKE0DHxgljNBAAO%209TXL0Y4OHwAAAABJRU5ErkJggg==" alt="Red dot">
</div>
</body>
</html>
I’ve also attached a screenshot of how it looks in a browser.
aspose-html-base64-img-issue.pdf (5.6 KB)
aspose-html-base64-issue-browser.jpg (128.0 KB)