How To Write on PDF Online?
Easy-to-use PDF software
How can I write a PDF reader starting from scratch?
I did that a while back. It's a considerable undertaking as the PDF file format is very flexible and complex, and at the lowest level it's still Postscript so you need a Postscript interpreter too. Expect to spend a couple months just figuring out PDF and how to interface to Postscript.
Write on PDF: All You Need to Know
That said, there are a lot of things you can do in the PDF and HTML, that are easy to extract and convert to HTML. Even for those of us doing it at my house, it's not a difficult job. It took me about two weeks to get the PDF conversion working, so I hope it will work for you.
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