Add bookmarks into PDF using PyPDF2.

Install pdfbookmarker:

$ pip install pdfbookmarker

1. Turn to your target PDF (e.g. MyBook.pdf), record bookmark titles and page numbers of the PDF into a TEXT file (e.g. my_bookmarks.txt) by hand with the following format:

   <nested level>"<bookmark title>"|<page number>
   

   For samples, see sample_bookmarks.txt. (Offsets are also supported, see here)

2. Generate a copy of MyBook.pdf with additional bookmarks file specified by my_bookmarks.txt:

   $ pdfbm MyBook.pdf my_bookmarks.txt

   An auto-detected, expected or suggested filename for bookmarks is MyBook.txt, when the input filenamne e.g. is MyBook.pdf.

   The default filename of the output PDF is MyBook-new.pdf; You, of course, can specify the filename explicitly:

   $ pdfbm MyBook.pdf my_bookmarks.txt MyBook_with_bookmarks.pdf

MIT