Free Online MOBI to EPUB Converter

Convert MOBI to EPUB online for free.

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What to expect when converting MOBI to EPUB

Typical file-size change

0–20% larger

Example

A 500 KB MOBI typically becomes 500 – 600 KB as EPUB.

Quality: Chapter structure and text preserved cleanly. Kindle-specific formatting (page-numbering, X-Ray data) is lost.

Best for: reading on non-Kindle devices — Apple Books, Kobo, Nook, Google Play Books all support EPUB natively.

Avoid when: you only read on Kindle — MOBI/AZW3 is the native Kindle format.

Tip: Modern Kindles (post-2022) also support EPUB via Send-to-Kindle, so this conversion is increasingly optional.

MOBI to EPUB: migrating to the open standard

MOBI's internal structure is HTML-based, similar to EPUB, but uses Amazon's proprietary packaging and index format. The conversion extracts the HTML content and images from the MOBI container, reconstructs chapter structure from the MOBI's index records, applies CSS formatting, and repackages everything as a standard EPUB. DRM-protected MOBI files (purchased from Amazon) cannot be converted — the content is encrypted with the device's serial number.

Convert MOBI to EPUB for reading on non-Kindle e-readers (Kobo, Nook, Apple Books) and reading apps that support EPUB but not MOBI. EPUB is the universal ebook standard supported by virtually all reading platforms except legacy Kindle.

MOBI vs EPUB: Side-by-side

Technical comparison of the two formats — useful for deciding which to use, or for confirming what changes during conversion.

Property	MOBI	EPUB
Full name	Mobipocket eBook	Electronic Publication
Year introduced	2000	2007
Developer / standard body	Mobipocket / Amazon	W3C (formerly IDPF)
MIME type	application/x-mobipocket-ebook	application/epub+zip
File extension	.mobi	.epub
Compression	PalmDOC compression	ZIP-compressed XHTML + CSS
Color / data depth	N/A	N/A
Max dimensions / size	Software-limited	Software-limited
Transparency	No	No
Animation	No	No
Standard / specification	Mobipocket	W3C EPUB 3.3 / ISO/IEC 23736
Best for	Older Kindle devices (replaced by AZW3 then KFX)	Apple Books, Kobo, Nook, Google Play Books — reflowable text

Read the full MOBI vs EPUB comparison

MOBI to EPUB FAQ

Quick answers about compatibility, quality, metadata handling, and the most common reasons to convert MOBI files to EPUB.

Can I convert MOBI books to EPUB for my Kindle or Kobo?

Yes. Upload your MOBI ebook and iFormat converts it to EPUB with chapter structure, cover art, and formatting preserved. Load the EPUB onto your Kindle, Kobo, Nook, or any eReader that supports the format.

How to convert MOBI to EPUB without losing the table of contents

Chapter navigation, the cover image, and text formatting all carry over during conversion. The EPUB has proper chapter links so you can jump between sections on your eReader just like the original MOBI.

Can I convert multiple MOBI ebooks to EPUB at once?

Yes — upload a batch of MOBI files and iFormat converts them all to EPUB. Each book downloads separately or as a ZIP, so you can convert an entire library in one session.

Does the text still reflow after converting to EPUB?

Yes — EPUB keeps text reflowable, so it adapts to any screen size and font setting on your eReader rather than being locked to a fixed page like a PDF.

Which reader is EPUB for?

EPUB is a reflowable ebook format best for Kobo, Apple Books, and Nook. Convert your MOBI to EPUB when your eReader or app opens EPUB more reliably, so the whole library works on one device.

What is MOBI?

MOBI is an Amazon ebook format, typically used for older Kindle devices. Converting it to EPUB makes the file easier to open, share, or upload where MOBI is not supported.

Why convert MOBI to EPUB?

EPUB is the open standard supported by Apple Books, Kobo, Nook, Google Play Books, and every reader app outside the Kindle ecosystem. If you bought a book in MOBI and want to read it on a non-Kindle device, EPUB is the bridge.

Will my Kindle highlights and annotations transfer?

No. Kindle stores annotations in a separate proprietary format tied to the device/account, not in the MOBI file itself. The converted EPUB contains the book content but no annotations.

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