You might take a look at a couple of projects.
First to split your pdf up you could use the python based stapler program.
And to convert the pdf to html you would take a look at pdf2htmlEX ->
On Wed, Apr 29, 2015 at 9:04 AM, Sergio Letuche <[log in to unmask]>
> Dear all,
> we have a pdf, that is taken from a to be printed pdf, full of tables. The
> text is split in two columns. How would you suggest we uploaded this pdf to
> the web? We would like to keep the structure, and split each section taken
> from the table of contents as a page, but also keep the format, and if
> possible, serve the content both in an html view, and in a pdf view, based
> on the preference of the user.
> Looking forward for your input.
> The document is made with Indesign CS6, and i do not know in which format i
> could transform it into
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