MOBI Converter
Free MOBI converter that runs entirely in your browser. No upload, no signup — convert to MOBI or from MOBI into 200+ supported formats in one click.
Drop any file here or click to browse
All file types supported
About MOBI
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 MOBI was the primary format for Kindle devices until being superseded by AZW3/KFX.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
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- −Superseded by AZW3 and KFX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
How to convert with the MOBI converter
- 1
Choose the MOBI file you want to convert from your PC, Mac or mobile device, or simply drag and drop it onto the page.
- 2
When your file is uploaded, the output format is preset to MOBI. You can add more files to batch-convert them together.
- 3
Click the gear icon and tweak codec, quality, resolution or other options if you need them, then apply to all files if you want.
- 4
Click the Convert button. When conversion completes, download the result to your computer or save it back to Google Drive / Dropbox.
Frequently Asked Questions
What is a MOBI file?▼
MOBI is an older e-book format once used by Kindle. Amazon replaced it with AZW3 and KFX, and new Kindles now recommend sending EPUB instead — but legacy MOBI libraries are still common.
Why convert MOBI to EPUB?▼
EPUB is the modern open standard, supported by Apple Books, Kobo, and Google Play Books. Converting older MOBI files frees them from the Kindle ecosystem.
Why convert MOBI to PDF?▼
PDF keeps a fixed page layout that is easy to print or share with anyone — no e-reader or book app needed, just any PDF viewer.
Does converting MOBI lose formatting?▼
Most text and chapter structure transfer cleanly. Some Kindle-specific DRM or advanced formatting may not survive — only unprotected MOBI files can be converted.
Are my e-books uploaded during conversion?▼
No. Conversion runs locally in your browser — your library stays on your device the whole time.
Supported Conversions
Specific converters
100% Free
No hidden fees, no subscriptions, and no limits. Enjoy complete access to all features gratis.
No Signup Required
Start converting immediately without creating an account or sharing email address.
Private & Secure
Your files never leave your device. All processing is completed locally for maximum privacy.
Batch Conversion
Convert multiple files simultaneously to save time. Fast and efficient multi-file queue.
Runs in Browser
Utilizes advanced client-side WebAssembly technology to process files directly inside your tab.
200+ Formats
Supports a wide variety of formats including images, documents, audio, video, and more.
MOBI Converter Quality Rating
How was your experience? You need to convert and download at least one file to provide feedback!