calibre : Converts your e-books from one format to another

calibre is free and open source e-book computer software that organizes, saves and manages e-books, supporting a variety of formats. It also supports e-book syncing with a variety of popular e-book readers.

calibre is cross-platform (programmed in Python and C) and is intended for the three main operating systems, Linux, Mac OS X and Windows. calibre was originally called libprs500, but was renamed calibre (lower case 'C') in mid-2008.

calibre supports the conversion of many input formats to many output formats. It can convert any of the following input formats to any of the output formats.

Input Formats: CBZ, CBR, CBC, CHM, EPUB, FB2, HTML, LIT, LRF, MOBI, ODT, PDB, PDF, PML, PRC^, RB, RTF, TCR, TXT

Output Formats: EPUB, FB2, LIT, LRF, MOBI, OEB, PDB, PDF, PML, RB, RTF, TCR, TXT.

calibre is primarily an e-book cataloging program. It is designed around the concept of the logical book, where a single database entry corresponds with the same book in a variety of formats. calibre supports the following formats for cataloging: AZW, AZW1, CBR, CBZ, CHM, EPUB, FB2, HTML, IMP, LIT, LRF, LRX, MOBI, ODT, OEBZIP, OPF, PDB, PDF, PML, PMLZ, PRC, RAR, RB, RTF, SNB, TPZ, TXT and ZIP.

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Source: calibre-ebook.com