Can pdfHTML render Base64 images to PDF?

Yes, iText supports external images as shown in different examples in the previous chapters, but it also supports inline images stored as Base64 strings.

See for instance the C07E03_Base64Image (Java/.NET) example. There's nothing special in the createPdf()/CreatePdf() method.

JAVA

public void createPdf(String html, String dest) throws IOException {
    HtmlConverter.convertToPdf(html, new FileOutputStream(dest));
}


public void createPdf(string html, string dest)
{
	HtmlConverter.ConvertToPdf(html, new FileStream(dest, FileMode.Create));
}

The only thing that is special about this example, is the base64.html HTML file (note that the base64-encoded image was truncated to fit this page):

HTML

<html>
    <head><title>Test</title></head>
    <body>
        <h1>Test</h1>
        <p>Hello World</p>
        <img alt="Embedded Image" src="data:image/png;base64,iVBORw0...ErkJggg==" />
    </body>
</html>

The result is identical to what we had in chapter 1 when we used an external image.

Source code, browser view and resulting PDF of a file with a base64-encoded image