First, you need to download Calibre HERE – Secondly, Download SIGIL HERE. Calibre is an ebook software for converting, editing and viewing ebook. It is available for every popular operating system out there for free. Sigil is a user-friendly software for creating and editing ebooks. Sigil is a free, open-source ebook editor for files in .EPUB format.
I’ll assume you have now downloaded Sigil and Calibre. For this Tutorial, i’m running Sigil and Calibre on Windows 10 and it does not require internet to convert your books. Let’s move on.
After the download, run Calibre. It should look like the screenshot below. Click on Add Books to add the Book(s) you’d like to convert
Now, to convert, right-click on the book, click on convert books -> Convert individually