Convert PDF content(with images) to the Inline HTML content

You can convert from PDF to HTML using a backend service to handle the conversion. With this, you can leverage the DocumentConverter to get the HTML content. Here is an example:
 

using (DocumentConverter documentConverter = new DocumentConverter())         
{         
   var input = @"C:\Inputfiles\input.pdf");        
   var output = @"C:\Outputfiles\output.html");         
   var jobData = DocumentConverterJobs.CreateJobData(input, output, DocumentFormat.Html);         
   jobData.JobName = "HTML Convert";         
        
   var documentWriter = new DocumentWriter();         
   documentConverter.SetDocumentWriterInstance(documentWriter);         
        
   var renderingEngine = new AnnWinFormsRenderingEngine();         
   documentConverter.SetAnnRenderingEngineInstance(renderingEngine);         
        
   var job = documentConverter.Jobs.CreateJob(jobData);         
   documentConverter.Jobs.RunJob(job);         
}

https://www.leadtools.com/help/sdk/tutorials/dotnet-core-convert-files-with-the-document-converter.html
https://www.leadtools.com/help/sdk/tutorials/dotnet-core-configure-and-run-the-document-service.html