Convert MOBI to EPUB
MOBI to EPUB converter that runs entirely in your browser. 100% free, no signup, no upload — your files never leave your device. One-click batch conversion.
MOBI is Amazon's retired legacy format; EPUB is the open standard every non-Kindle reader speaks — Kobo, Apple Books, Google Play Books, and most apps. Converting MOBI to EPUB frees your library from the Kindle ecosystem. DRM-free files convert cleanly; complex formatting may need a polish pass afterward.
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All file types supported
About formats
MOBI
MOBI is an e-book format originally developed by Mobipocket and later acquired by Amazon. MOBI files are based on the Open eBook standard and support DRM protection, bookmarks, annotations, and reflowable text. MOBI was the primary format for Kindle devices until being superseded by AZW3/KFX. MOBI files can still be read by Kindle apps, Calibre, and many third-party e-readers.
- Developer
- Mobipocket / Amazon
- Initial release
- 2000
- Compression
- Lossy
- Color depth
- up to 8-bit
- Transparency
- No
- Animation
- No
Best for
- Reading on older Kindle devices
- Legacy e-book distribution
- DRM-protected Kindle content
- Calibre library management
- Backward-compatible e-book delivery
Pros
- +Supported by Kindle apps and devices
- +Supports DRM, bookmarks, and annotations
- +Reflowable text
- +Readable by Calibre and many e-readers
Cons
- −Superseded by AZW3 and KFX
- −Limited formatting vs EPUB
- −Only 8-bit color
- −No longer Amazon's primary format
EPUB
EPUB (Electronic Publication) is a free, open e-book standard maintained by the W3C (formerly IDPF). EPUB files are ZIP-based archives containing XHTML content, CSS styling, images, and navigation elements, providing reflowable content that adapts to different screen sizes. EPUB is the most widely supported e-book format and is read by Apple Books, Google Play Books, Kobo, Calibre, and most e-readers except older Kindle devices.
- Developer
- W3C (formerly IDPF)
- Initial release
- 2007
- Compression
- Lossless
- Color depth
- up to 32-bit
- Transparency
- Yes
- Animation
- Yes
Best for
- Distributing e-books broadly
- Reflowable reading on e-readers
- Apple Books and Kobo publishing
- Open-standard e-book delivery
- Adaptive-screen digital books
Pros
- +Open W3C standard
- +Reflowable content adapts to screen size
- +ZIP-based with XHTML and CSS
- +Supported by most e-readers except older Kindle
Cons
- −Older Kindle devices don't support EPUB
- −DRM can restrict access
- −Rendering varies across readers
- −Complex layouts can be hard to reflow
How to convert MOBI to EPUB
- 1
Select MOBI files from your computer, Google Drive, Dropbox, a URL, or by dragging them onto the page.
- 2
Choose epub — or any other format you need as a result (more than 200 formats supported).
- 3
Let the file convert, then download your epub file right away.
MOBI vs EPUB
| Property | MOBI | EPUB |
|---|---|---|
| Compression | Lossy | Lossless |
| Animation | No | Yes |
| DRM support | Yes | Yes |
| Open format | No | Yes |
When to use MOBI vs EPUB
MOBI
- Reading on older Kindle devices
- Legacy e-book distribution
- DRM-protected Kindle content
- Calibre library management
- Backward-compatible e-book delivery
EPUB
- Distributing e-books broadly
- Reflowable reading on e-readers
- Apple Books and Kobo publishing
- Open-standard e-book delivery
- Adaptive-screen digital books
Use cases for MOBI → EPUB
- Reading on older Kindle devices
- Legacy e-book distribution
- DRM-protected Kindle content
- Calibre library management
- Backward-compatible e-book delivery
- Distributing e-books broadly
- Reflowable reading on e-readers
- Apple Books and Kobo publishing
- Open-standard e-book delivery
- Adaptive-screen digital books
Frequently Asked Questions
Is converting MOBI to EPUB free?
Which devices and platforms can I use to convert MOBI to EPUB?
Are my MOBI files uploaded to a server?
Can I convert multiple MOBI files at once?
What is the maximum file size?
Will converting MOBI to EPUB lose quality?
Does EPUB support transparency from MOBI?
Will the converted EPUB file be larger than the MOBI?
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