There are a few ways to create reflowable content from PDFs. One way is to use a PDF to HTML converter, which will convert the PDF into HTML code that can be used on a website or blog. Another way is to use a PDF to EPUB converter, which will convert the PDF into an EPUB file that can be read on most e-readers. Finally, you can use a PDF to MOBI converter, which will convert the PDF into a MOBI file that can be read on the Kindle.