How to Convert Your Old MOBI Files to EPUB Using Calibre
Last Updated: 24 July, 2026
TL;DR – If you’ve got a stash of old .mobi books and want to read them on anything that isn’t a Kindle, Calibre (free, open‑source, and surprisingly powerful) can turn them into clean .epub files in a few clicks or a one‑liner in the terminal. The conversion is loss‑less for plain text, preserves most metadata, and works in bulk. Just remember: Calibre does not strip DRM – you must handle that legally on your own.