Kindle Fire: How to display .mobi files as books and not documents

At some point you will run into the situation where you have transferred an ebook in .mobi format to your Kindle Fire and it is displayed as a document instead of a book. This creates an inconvenience since now your books are in two locations instead of just one. Here is how to make your .mobi files be registered as books on the device.

The issue that is causing the device to register your .mobi file as a document rather than a book is that there was a personal doc tag (PDOC) placed in the .mobi file during conversion. This tag needs to be removed by reconverting the book without the problematic PDOC.

1. Connect your Kindle Fire to your computer and move the desired .mobi file(s) from the device to your computer.

2. To perform the conversion on your .mobi file, you will need to download and install Calibre which is a free and powerful ebook management system for Windows, OS X, and Linux.

3. Once the software is installed, launch Calibre.

4. Go to the top of the application and select Add books.

5. Browse to the location of the .mobi file you wish to fix, select the file and click the Open button.

6. Once the file has been imported into your Calibre Library, select the file and click the Convert books button at the top of the screen.

7. When the Convert window appears, go to the upper-right and change the Output format to MOBI using the dropdown button.

8. In the left pane, select MOBI Output.

9. In the right pane, under Kindle options, go to Personal Doc tag and delete the [PDOC] that is in the associated textbox.

10. Click the OK button.

The book will go through the conversion process. Once finished, you can move the new file to your Kindle Fire and it will now be recognized as a Book instead of a Document. If you are unsure of where Calibre saved the new file, find the desired book in Calibre’s list on its main screen and right-click on the desired book, then select Open containing folder.


About Rob Rogers

Once a prolific author here on Tech-Recipes, Rob has moved on to greener pastures.
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24 Responses to “Kindle Fire: How to display .mobi files as books and not documents”

  1. January 09, 2012 at 1:28 pm, Jim said:

    The Fire doesn’t show up as a drive (or folder) on my MacBook Pro, so there’s no way to move the file.

    I’d have to get a copy to my Mac, run it through Calibre without the PDOC tag, and then email it to myself…I *think*. Although so far anything I’ve emailed, no matter what the format, ends up in downloads (using a file app on the Fire…that doesn’t have a way of moving files between folders).

    How do you get the Fire to appear in finder in the first place?


    • October 23, 2012 at 3:08 am, Caitlin said:

      > I downloaded Android File Transfer ( and then you can drag and drop to the Books or Document folders when connected by USB


  2. June 22, 2012 at 10:49 am, Dara Mahon said:

    Thank you, this worked a treat.


  3. July 15, 2012 at 4:19 am, Brenda said:

    Thanks for the ste-by-step. Worked perfectly!


  4. September 27, 2012 at 6:10 am, cesar said:

    Wow, you’re a genius!!!! You’re the only one that could solve this problem after hours of frustrating searching. Thank you very very much!!!


  5. November 08, 2012 at 5:03 pm, Allison said:

    thank you thank you thank you.

    thank you.


  6. December 07, 2012 at 11:40 am, Derek said:

    Sorry but doesnt work?


  7. December 22, 2012 at 6:50 am, Minahil said:

    sorry but its still coming under docs!


  8. December 26, 2012 at 2:27 pm, Kate said:

    it’s not working! does anyone know why?


  9. December 31, 2012 at 4:42 pm, Pendergast said:

    I think it’s because of the wifi transfer. All document (not bought books) sent using wifi will be presented as documents although you have made this trick. You have to use the usb cable.


  10. January 01, 2013 at 8:09 pm, Pamela L said:

    Does not work for me either using Kindle app or when emailing to kindle user


  11. January 06, 2013 at 11:25 am, Br0ther$ said:

    Excellent instructions – many thanks!


  12. January 12, 2013 at 10:11 pm, Ozum said:

    I was trying to solve this problem on my Kindle Paper White. Unfortunately it didn’t work, it still shows them as “personal” and not as books…


  13. February 14, 2013 at 10:23 am, Michelle said:

    this was VERY helpful and worked amazingly THANK YOU :) …however, I used it to convert 500 books (took all night lol) and Calibre saved the original file (original_mobi) AND the new one (.mobi) to the individual author’s folders. I want to now transfer the new files to my kindle into the book folder but how can I easily do this with 500 books? if I do a copy, drag and drop, it will copy both versions. Is there a way to save all the new files to a separate folder and do the transfer from there? I have over 1500 MORE files Id like to convert as well. In Calibre, the files are separated from original and new, but Im not that familiar with the program and dont want to get slap-happy with the buttons :)


  14. July 14, 2013 at 10:51 am, Ramon Somoza said:

    Thanks for the tip. I was using Calibre to make the conversion into MOBI, and it did not work properly, until I applied your suggestion. Thanks!


  15. July 18, 2013 at 2:56 am, Agnieszka said:

    Thank you! It works great :)


  16. September 13, 2013 at 12:08 pm, Tom said:

    does not work


  17. December 01, 2013 at 2:28 am, Chad Cloman said:

    Amazon has changed things. It is no longer sufficient to just delete the [PDOC] tag. You must replace it with the [EBOK] tag (exactly as shown, with brackets).


  18. January 04, 2014 at 5:45 pm, Rhonda said:

    I followed your instructions and converted the file without the PDOC tag and the book still goes to my Documents folder. The only variation to your instructions is that I email the converted file to my Kindle/Kindle App. Any suggestions?


  19. January 06, 2014 at 4:41 pm, Dim said:

    this does not work when i sent by mail to Amazon cloud library


  20. January 19, 2014 at 3:29 pm, Mary Lou said:

    Genius! Thanks. It’s so much nicer having my books in one place!


  21. January 29, 2014 at 10:37 pm, Taylor said:

    Now I don’t have the cover photo?


  22. February 22, 2014 at 5:56 pm, Wzaman said:

    I can’t understand what I have to do making kindle after converted to .mobi file.


  23. March 10, 2014 at 3:55 pm, Jonas said:

    Hi, I would like to do this with a book on my kindle that already includes a bunch of highlights and notes. Do you know if the conversion as explained in the article will delete my already existing notes?



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