.mobi File Extension

Mobipocket eBook

Data 6 searches

What is a .mobi file?

The MOBI file format is a proprietary ebook format developed by Mobipocket, based on the Open eBook standard. It was initially designed for mobile devices with limited processing power and storage. MOBI files can contain digital rights management (DRM) to protect copyrighted content. The format supports basic formatting, images, and annotations. It gained popularity due to its use by Amazon's Kindle devices before Amazon transitioned to its own AZW format, which is based on MOBI. While Amazon no longer directly supports MOBI for new Kindle content, it remains a widely used format for older ebooks and those distributed outside of the Kindle ecosystem. MOBI files can be read on various devices and platforms using dedicated ebook reader software. The format is relatively simple compared to more modern ebook formats like EPUB, but it remains a viable option for distributing text-based content.

.mobi File

Mobipocket eBook

Compatible Software Alternatives

Software Compatibility

Windows

  • Calibre
  • Kindle for PC
  • FBReader
  • Sumatra PDF (limited support)

macOS

  • Calibre
  • Kindle for Mac
  • FBReader
  • iBooks (older versions)

Linux

  • Calibre
  • FBReader
  • Okular
  • Cool Reader

Mobile

  • Kindle app (iOS/Android)
  • FBReader (iOS/Android)
  • Moon+ Reader (Android)
  • Lithium (Android)

Alternative File Formats

Related Categories

Data Files Archive FilesAudio FilesDocument Files

Frequently Asked Questions About .mobi Files

To open a .mobi file, you need compatible software. Here are some options:

  • Calibre
  • Kindle for PC
  • Kindle app (iOS/Android)

Check the "Software Compatibility" section above for a complete list of programs that can open .mobi files on different operating systems.

To convert a .mobi file to another format, you can:

  1. Use compatible software: Many programs that open .mobi files also allow saving or exporting to different formats. For example, you might try using Calibre or Calibre.
  2. Try online conversion services: Websites like Zamzar, CloudConvert, or Online-Convert can transform files between formats without installing software.
  3. Convert to recommended alternatives: For .mobi files, consider converting to .epub, .azw, .pdf for better compatibility.
  4. Specialized conversion tools: Search for ".mobi converter" to find tools specifically designed for this file type.

Note: Converting files may result in some loss of formatting, quality, or functionality depending on the compatibility between formats.

If you're having trouble opening a .mobi file, try these troubleshooting steps:

  1. Verify the file extension is correct: Sometimes files may be incorrectly named. Make sure the file truly is a .mobi file.
  2. Update your software: Ensure you're using the latest version of your chosen program.
  3. Try alternative software: If one program doesn't work, try another from our compatibility list.
  4. Check for file corruption: The file might be damaged. Try to obtain a new copy if possible.
  5. Look for file converters: Converting to a more common format might help.

Like any file type, .mobi files can be safe or potentially risky depending on their source:

  • From trusted sources: Files from reputable websites, colleagues, or friends are generally safe.
  • From unknown sources: Exercise caution with files from unfamiliar websites or emails.

Safety recommendations:

  • Always scan files with antivirus software before opening them
  • Keep your operating system and applications updated
  • Be particularly cautious with executable file types

Common issues with .mobi files include:

  • Compatibility problems: Older or newer versions of software may not fully support certain .mobi files
  • Missing elements: Fonts, media, or other components may not transfer correctly between systems
  • File corruption: Incomplete downloads or transfer errors can damage files
  • Format variations: Different software may implement the .mobi format in slightly different ways

If you're experiencing issues with a specific .mobi file, you might need to:

  • Try opening it with alternative software
  • Ask the file creator to save it in a different format
  • Look for specific patches or updates for your software

Chat with AI About .mobi Files

Hello! I'm your AI assistant. Ask me anything about .mobi files and I'll try to help you.

Suggested questions: