Convert DOC to MOBI
Max file size 100mb.
DOC vs MOBI Format Comparison
| Aspect | DOC (Source Format) | MOBI (Target Format) |
|---|---|---|
| Format Overview |
DOC
Microsoft Word Binary Document
Binary document format used by Microsoft Word 97-2003. Proprietary format with rich features but closed specification. Uses OLE compound document structure. Still widely used for compatibility with older Office versions and legacy systems. Legacy Format Word 97-2003 |
MOBI
Mobipocket eBook Format
eBook format originally developed by Mobipocket SA, acquired by Amazon in 2005. Based on Open eBook standard with proprietary extensions. Primary format for older Kindle devices. Supports DRM protection. Being phased out in favor of AZW3/KF8. Kindle Legacy Amazon Format |
| Technical Specifications |
Structure: Binary OLE compound file
Encoding: Binary with embedded metadata Format: Proprietary Microsoft format Compression: Internal compression Extensions: .doc |
Structure: PalmDOC database format
Encoding: UTF-8 with PRC container Format: Proprietary Amazon/Mobipocket Compression: PalmDOC or HUFF/CDIC Extensions: .mobi, .prc |
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| Version History |
Introduced: 1997 (Word 97)
Last Version: Word 2003 format Status: Legacy (replaced by DOCX in 2007) Evolution: No longer actively developed |
Introduced: 2000 (Mobipocket)
Amazon Acquisition: 2005 Status: Legacy (replaced by AZW3/KF8) Evolution: MOBI -> AZW -> AZW3/KF8 |
| Software Support |
Microsoft Word: All versions (read/write)
LibreOffice: Full support Google Docs: Full support Other: Most modern word processors |
Amazon Kindle: All devices and apps
Calibre: Full read/write/convert Mobipocket Reader: Legacy (discontinued) FBReader: Read support |
Why Convert DOC to MOBI?
Converting DOC documents to MOBI format transforms your Word documents into eBooks optimized for Amazon Kindle devices and apps. MOBI (Mobipocket) is Amazon's legacy eBook format that works on all Kindle devices, from the original Kindle to the latest Paperwhite and Oasis models.
MOBI was developed by Mobipocket SA and acquired by Amazon in 2005, becoming the foundation for the Kindle ecosystem. While Amazon has introduced newer formats like AZW3/KF8, MOBI remains supported on all Kindle devices and offers the widest compatibility for personal documents on Kindle.
One of MOBI's key advantages is its seamless integration with the Kindle ecosystem. You can use Amazon's "Send to Kindle" feature to deliver MOBI files wirelessly to your devices, and they'll sync with Whispersync just like purchased books. Your reading progress, bookmarks, and notes stay synchronized across all your Kindle devices and apps.
For personal documents and sideloading, MOBI offers excellent compatibility. Whether you're transferring files via USB or email, MOBI files work reliably on every Kindle device ever made. This makes it ideal for converting personal Word documents to read on your Kindle.
Key Benefits of Converting DOC to MOBI:
- Universal Kindle Support: Works on all Kindle devices and apps
- Send to Kindle: Email documents directly to your Kindle
- Whispersync: Sync reading progress across devices
- Dictionary Lookup: Built-in dictionary support on Kindle
- Efficient Size: Good compression for portable files
- USB Transfer: Simple sideloading via cable
- Proven Format: Stable, reliable format since 2000
Practical Examples
Example 1: Personal Document for Kindle
Input DOC file (report.doc):
Annual Report 2024 Company Analysis Executive Summary This report provides an analysis of company performance over the past year... Financial Overview Revenue increased by 15%...
Output MOBI benefits:
- Read on Kindle during travel - Adjustable font size - Highlight important sections - Add personal notes - Sync progress with Kindle app - Available offline
Example 2: Manuscript for Review
Input DOC file (manuscript.doc):
The Lost Island A Novel by Jane Writer Chapter 1 The storm had been raging for three days when Maria first spotted the island through the rain...
MOBI conversion advantages:
Perfect for beta readers: - Send via Kindle email - Read on their preferred device - Built-in dictionary for unfamiliar words - Comfortable reading experience - No special software needed
Example 3: Study Materials
Input DOC file (notes.doc):
Biology 101 Study Notes Professor Johnson Cell Structure - Nucleus: contains DNA - Mitochondria: energy production - Ribosomes: protein synthesis Key Terms: Organelle - specialized cell structure
MOBI for studying:
- Study on Kindle e-ink (easy on eyes) - Highlight terms for review - Search within document - Create flashcards from notes - Long battery life for study sessions - No distractions (unlike tablet)
Frequently Asked Questions (FAQ)
Q: What Kindle devices support MOBI format?
A: All Kindle devices support MOBI format: Kindle 1, 2, 3, DX, Keyboard, Touch, Paperwhite (all generations), Oasis (all generations), and all Kindle Fire tablets. MOBI also works in Kindle apps for iOS, Android, PC, and Mac, as well as Kindle Cloud Reader.
Q: What is the difference between MOBI and AZW3?
A: MOBI is the older Kindle format with basic formatting, while AZW3 (KF8) is Amazon's newer format with HTML5/CSS3 support and advanced typography. For newer Kindle devices with enhanced typesetting, AZW3 is preferred. MOBI offers maximum compatibility with older devices. Use our DOC to AZW3 converter for the latest format.
Q: Can I send MOBI files to my Kindle via email?
A: Yes! Every Kindle has a unique email address (find it in Settings > My Account > Send-to-Kindle Email). Send your MOBI file as an attachment, and it will appear in your Kindle library. Note: Amazon now recommends EPUB for Send to Kindle, but MOBI still works.
Q: How do I transfer MOBI files via USB?
A: Connect your Kindle to your computer via USB cable. Open the Kindle drive and navigate to the "documents" folder. Copy your MOBI file there and safely eject the Kindle. The book will appear in your library immediately.
Q: Will my formatting be preserved in MOBI?
A: Basic formatting (headings, bold, italic, lists, paragraphs) will be converted. Complex Word-specific features may be simplified for the eBook format. MOBI supports reflowable content, so exact page layouts won't be preserved, but the reading experience will be optimized for Kindle screens.
Q: Is MOBI being discontinued?
A: Amazon is focusing on AZW3/KF8 and now accepts EPUB for Send to Kindle. However, MOBI remains fully supported on all Kindle devices. For maximum compatibility with older Kindles, MOBI is still a reliable choice. For publishing on Amazon KDP, they now prefer EPUB or DOCX.
Q: Can I read MOBI on non-Kindle devices?
A: MOBI can be read with Calibre (all platforms), FBReader, and some other reading apps. However, MOBI is primarily designed for Kindle. For non-Kindle e-readers like Kobo or Nook, consider converting to EPUB instead.
Q: Should I use MOBI or EPUB for Kindle?
A: For personal documents, both now work with Send to Kindle. MOBI has broader compatibility with older Kindles and direct USB transfer. EPUB is Amazon's new preferred format for email delivery. For maximum compatibility across all Kindle generations, MOBI is the safer choice.