PDF Nomad 2 can explode a document into chapters, or, for that matter, into ranges of pages according to any selection in the outline list.
The contextual menu lists the levels of outlines that are present in the document. You batch select all outlines at a level through the menu. The levels in the list are automatically expanded or collapsed to reflect your choice.
Explode by Outlines menu item of the
explodes the range of pages corresponding to each selected outline
into separate PDF documents. (If no outlines are selected, all visible
outlines are exported.) The page range for an outline starts with the
page the outline links to and ends with the page that precedes the
page linked to by the following outline. (You can also opt for the
first page of the next outline to be included in the the preceding
range. This is useful when new chapters/sections do not always start
on a new page.)
The created documents are named according to the original document title and the page ranges from the original document they include. As with other PDF export functions, a filter can be applied during the export.