I've seen some conversion sites that can convert .epub files to .pdb files but I was unaware of a source library or a way to convert a file locally for testing on the Nook. So my question is: Do you know of a library or a way to convert an .epub file to a .pdb file to test on a Nook? I would like to do this without using Calibre.

  • Why not use Calibre? If bugs have you reported them or ask here how to work round
    – mmmmmm
    Mar 8, 2014 at 19:46

2 Answers 2


There is an old program called TL-PDB. The original authors site seems to be here according to this site, but I have some difficulty reading the original.

You can read about it here and here as well (download sites for free software seem to copy each others content).

Calibre can generate PDB output (not surprisingly as MOBI is a superset of PalmDoc).

  • Edited my question, not a fan of the bloating Calibre provides and the inaccuracy it causes. +1 though for the answer. Mar 7, 2014 at 16:02
  • @Gramps Is it the install that bothers you, if it is the GUI that bothers you: you can do the conversion on the commandline.
    – Anthon
    Mar 7, 2014 at 16:05
  • @Gramps The format for PalmDoc, IIRC is not so difficult. Would you consider writing something yourself (or at least helping to debug)?
    – Anthon
    Mar 7, 2014 at 16:07
  • No its the bloat and errors that bothers me with Calibre.. I hate the unnecessary bloating and splitting of content I see. I also dislike when I'm sent a Calibre book and it has generated a single .html file and .css file for each page. Plus Calibre doesn't produce a valid .epub most of the time. I have considered writing my own and might create a tutorial for it one day but lately I've been slammed. Mar 7, 2014 at 16:09
  • Calibre;s split is because some epub readers have a limit on the html size - I would like to see where it has a html file per page and where the epub is invalid
    – mmmmmm
    Mar 8, 2014 at 19:48

Calibre offers .pdb as both input and output file types. This should meet your requirements, for converting from .epub to .pdb.

  • LOL, so as I am writing my answer (with links) the existing answer and the question are both edited... Mar 7, 2014 at 16:05
  • ha ha sorry man.. thanks for the effort though Mar 7, 2014 at 16:09

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