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Calibre is very good at converting epubs to mobi (and the other way around.) It ships with a commandline tool called `ebook-convert` too so you don't have to m

• thelastidiot 8y ago
  If you can pass the clunky interface and cryptic error message from that badly designed app.
  • JackCh 8y ago
    Yes the UX design is very poor, but the core conversion functionality works well once you figure out how the awful GUI works. The `ebook-convert` commandline tool is just fantastic though. It has a very straight forward interface. ebook-convert input_file output_file [options] And there isn't very much impedance mismatch between mobi and epub, so the conversion back and forth between the two will almost always be high quality.