Two year ago I developed a simple script to convert any document (PDF, RTF, TXT,...) to EPUB format, using Calibre.
The script was very simple to use, just put the script in the Calibre folder, and then drag and drop the file you want to convert on the script.
Last year I added some more feature to the script.
Today a reader asked for a script that convert in MOBI format, so I created a new version of the script that convert to MOBI.
Click here to Download the 'anything to MOBI' conversion script.
You need to place this script in the same folder where you have the Calibre executable.
Then you can drag and drop the file you want to convert on the script:
After the conversion, you'll find the new converted EPUB file in the same folder as the original file.
Check the original articles for more information about this script, and how to use it.