Calibre

[Kirito]

hah, no credit to me for telling you about it, I see how it is. Take all the credit.

Also, Calibre supports a wide variety of formats, you should probably note those

Supported formats include CBZ, CBR, CBC, CHM, DJVU, EPUB, FictionBook,
HTML, HTMLZ, LIT, LRF, Mobipocket, ODT, PDF, PRC, PDB, PML, RB, RTF,
SNB, TCR, TXT and TXTZ.


I highlighted a format that many users here will find interesting.