
If you want to transfer the e-books to other devices or convert e-books to other type, please use the best e-book manager & converter--- Calibre. Calibre is a freeware which can convert e-books from format to format. Calibre supports the input formats: CBZ, CBR, CBC, CHM, EPUB, FB2, HTML, LIT, LRF, MOBI, ODT, PDF, PRC, PDB, PML, RB, RTF, SNB, TCR, TXT. The output formats: EPUB, FB2, OEB, LIT, LRF, MOBI, PDB, PML, RB, PDF, SNB, TCR, TXT.
Download & install Calibre.
Tips:
After installed the best ebook converter, view it like this.
Add your ebooks to library, (when added, the books will list at the top of books list).
Select ebook on center menu list, click "convert books" to process converting.
A ebook converting window will pop, choose your Output format and set the output books, it's easy and user-friendly.
The output is list all the book types, like ePUB,FBZ,HTMLZ,LIT,LRF,MOBI,PDB,PDF,TEXT etc
All set, Click "OK" to start converting. The pop windows will close, and the converter is starting.
If not pay more attentions, you can't find any different on main windows, and can't know when the converting process is finished!
So, turn your eyes to right bottom, you will see the "Jobs: 1" status.
When converting process finished, the status become "Jobs: 0".
And you will see "Formats: EPUB, PDF", they are the different types of the books. Want to find the books file? Click "Click to open", you will find them.
Note:
If the the above notification pops up during the conversion, it means that book will be DRM protected. In this case, you will have to install calibre DRM removal plugins to strip DRM from the books. And then add those drm free books to calibre again to convert formats.
If you want drm-removing much easier, here I highly recommend a powerful calibre alternative -- Epubor Ultimate-- all-in-one tool that includes drm removal + formats converter.
- Kindle DRM Removal
- Sony / Kobo / Google EPUB & PDF DRM Removal (ADE DRM Removal)
- Nook DRM Removal

Ada Wang works for Epubor and writes articles for a collection of blogs such as ebookconverter.blogspot.com.
Hi, there
Sorry for the inconvenience.
Hopefully you will find a much better solution.
Regards.
Thank you for your help.
Hi, Nagraj
Does calibre show anything like "DRM protected" or other info?
If that PDB is purchased from eReader, it is likely to be DRM protected, which will have to be DRM stripped before the conversion.
Refer to this post for more details:
www.epubor.com/how-to-convert-pdb-to-pdf.html
thanks!
Calibre is an amazing piece of software, it is a powerful conversion tool that allows you complete control over the output of your book. That being said, I understand that some people may have trouble getting started with all the options in the conversion process. I suggest you check out the wealth of "How to's" and "Tips and Tricks" online. Calibre's site has a downloadable manual along with online step by step instructions, another site to check out is the MobileRead Forums. I was overwhelmed myself at first, however, I can assure you that if you put some time into learning the program you will come to appreciate how much it really kicks Arse! Btw, pdf's are really difficult to convert correctly because the are basically an image file.
Me and my friend are working on a little project, Converter central, a tool for converting many different things such as units and clothes. We have recently been considering to add a similar feature as you are describing for converting PDFs and other eBook formats, but in a much more lightweight version with only the most basic options. I wanted to ask you in person, which formats do you feel are the most relevant to convert between? And is there any particular option you think is more useful? I respect totally if you don't have time to give any feedback, and that's fine, but if you do I'd love to hear your thoughts :)
If you would like me to critique an item or book I would like the distraction.
Thank You
Dora
If you can't get expected result than it is not SW for you - you have to dive deep into settings to get better result, and i fixed some pretty messed up PDFs. In most cases bad result means that the source is s***, not that SW is bad.