Convert EPUB to Kindle MOBI — Offline
Drop one or more EPUB files onto MiniMax Converter and convert them to Kindle-ready MOBI (or AZW3, the newer Kindle format). Batch a whole folder if you like. Runs locally — no upload, no file-size limit, no watermark — and the result side-loads straight to your Kindle.
How to convert
- Drop one or more .epub files onto the MiniMax Converter window, or pick a whole folder of them.
- Choose MOBI as the output format (or pick AZW3 in the format chooser if your Kindle is a newer model).
- Leave the defaults, or adjust output options before converting.
- Click Convert and save the .mobi file — then side-load it to your Kindle by USB or Send-to-Kindle.
What you get out
The conversion is handled by Calibre's ebook-convert engine — the same tool Calibre itself uses. Chapters, the table of contents, embedded images and most formatting carry over, and a logical TOC is built from the EPUB's structure. EPUB and MOBI are both reflowable formats, so this is text-faithful rather than pixel-perfect: complex fixed-layout pages, heavy CSS, or intricate tables may reflow differently on an e-reader.
MOBI or AZW3?
MOBI is the long-standing Kindle format and works on nearly every Kindle and the Kindle app. AZW3 (also offered here) is Amazon's newer format with better typography and CSS support — pick it for newer Kindles. Both are produced by the same Calibre engine; choose whichever your device side-loads cleanly. If in doubt, MOBI has the widest compatibility.
Why offline?
Online EPUB-to-MOBI sites cap file sizes, make you upload every book, and sometimes inject ads or tracking into a file you'll keep on a personal device. Local conversion handles books of any size, runs at SSD speed, and your library never leaves your machine — which matters for DRM-free purchases and personal documents alike.
Questions and answers
Will the converted MOBI work on my Kindle?
Yes — MOBI side-loads to nearly every Kindle and the Kindle app, by USB cable or Send-to-Kindle. For newer Kindles you can also output AZW3, which has better typography support.
Does it keep the chapters and table of contents?
Yes. Calibre builds a logical table of contents from the EPUB's structure, and chapters, headings, and embedded images carry over. Because both formats reflow text, the exact line breaks and page layout will differ from the original.
Can it convert a whole folder of EPUBs at once?
Yes. Drop multiple files or a folder and they convert in batch, each producing its own MOBI. There is no file-size cap, so large illustrated books are fine.
Will it remove DRM from a protected EPUB?
No. MiniMax Converter does not break DRM. It only converts DRM-free EPUBs — books you own without copy protection, or files you exported yourself. Protected store files will fail to convert.
Related tools
Get MiniMax Converter
Cross-platform desktop app. Linux free for non-commercial use; Windows & macOS one-time €20 license. No subscription, no telemetry, no account.