Which Python libraries are best for building a PDF to HTML conversion tool? [closed]

I am planning to build a PDF to HTML conversion tool using Python, and I am currently in the design and learning phase of the project.

The main goal of this tool is to:

Convert PDF files into well-structured HTML

Preserve text content

Maintain basic layout elements such as paragraphs and headings

Properly handle images

Optionally support multiple PDF files in one run (batch processing)

At this stage, I am not asking for full code, but I want to understand the conceptual approach and the recommended Python libraries for this kind of project.

Specifically, I would like guidance on:

Which Python libraries are commonly used for PDF parsing and text extraction

Libraries that help with layout preservation (fonts, positioning, spacing)

Tools or libraries for converting extracted content into HTML

Any libraries that can help with images inside PDFs

Suggestions for handling multiple files efficiently (for example, concurrency or threading)

Best practices or limitations I should be aware of while converting PDFs to HTML

I want to follow a clean and maintainable approach, so understanding the right libraries and their roles in the overall workflow would be very helpful.

Any explanations, library recommendations, or real-world insights would be appreciated.
Thank you!