MOBI file icon

MOBI File Extension

Mobipocket EBook
  • Developer
    Amazon
  • Category
  • Popularity
    3.2 (14 votes)

What is MOBI file?

All those files that consist of the .MOBI file format commonly comprises of the digital eBook content that has been storing the Mobipocket binary eBook format. The .MOBI extension supports the standard HTML format, and it is one of the open eBook publication file formats suitable for eBook distribution.

The .MOBI format consists of the DRM copyright protection features. This feature is useful in preventing the unauthorized personnel from copying or viewing the eBook that the .MOBI file contains. The .MOBI file format is the one that is utilized mostly for eBooks that are compatible with use on the Smartphones, Amazon Kindle and PDAs.

Programs which support MOBI file extension

The following list contains programs grouped by 4 operating systems that support MOBI files. Files with MOBI extension, just like any other file formats, can be found on any operating system. The files in question may be transferred to other devices, be it mobile or stationary, yet not all systems may be capable of properly handling such files.

Updated: 05/02/2023

How to open file with MOBI extension?

Problems with accessing MOBI may be due to various reasons. On the bright side, the most encountered issues pertaining to Mobipocket EBook files aren’t complex. In most cases they can be addressed swiftly and effectively without assistance from a specialist. The list below will guide you through the process of addressing the encountered problem.

Step 1. Download and install Amazon Kindle

Install software to open MOBI file The most common reason for such problems is the lack of proper applications that supports MOBI files installed on the system. This issue can be addressed by downloading and installing Amazon Kindle or different compatible program, such as Calibre, FBReader, BookDesigner. Above you will find a complete listing of programs that support MOBI files, classified according to system platforms for which they are available. If you want to download Amazon Kindle installer in the most secured manner, we suggest you visit Amazon.com, Inc. website and download from their official repositories.

Step 2. Verify the you have the latest version of Amazon Kindle

Update software that support file extension MOBIYou still cannot access MOBI files although Amazon Kindle is installed on your system? Make sure that the software is up to date. Software developers may implement support for more modern file formats in updated versions of their products. This can be one of the causes why MOBI files are not compatible with Amazon Kindle. The latest version of Amazon Kindle should support all file formats that where compatible with older versions of the software.

Step 3. Assign Amazon Kindle to MOBI files

After installing Amazon Kindle (the most recent version) make sure that it is set as the default application to open MOBI files. The method is quite simple and varies little across operating systems.

Associate software with MOBI file on Windows

The procedure to change the default program in Windows

  • Clicking the MOBI with right mouse button will bring a menu from which you should select the Open with option
  • Select Choose another app → More apps
  • To finalize the process, select Look for another app on this PC entry and using the file explorer select the Amazon Kindle installation folder. Confirm by checking Always use this app to open MOBI files box and clicking OK button.
Associate software with MOBI file on Mac

The procedure to change the default program in Mac OS

  • Right-click the MOBI file and select Information
  • Proceed to the Open with section. If its closed, click the title to access available options
  • Select the appropriate software and save your settings by clicking Change all
  • If you followed the previous steps a message should appear: This change will be applied to all files with MOBI extension. Next, click the Continue button to finalize the process.

Step 4. Ensure that the MOBI file is complete and free of errors

Should the problem still occur after following steps 1-3, check if the MOBI file is valid. Being unable to access the file can be related to various issues.

Check MOBI file for viruses
1. Check the MOBI file for viruses or malware

If the MOBI is indeed infected, it is possible that the malware is blocking it from opening. Scan the MOBI file as well as your computer for malware or viruses. If the MOBI file is indeed infected follow the instructions below.

2. Ensure the file with MOBI extension is complete and error-free

If the MOBI file was sent to you by someone else, ask this person to resend the file to you. It is possible that the file has not been properly copied to a data storage and is incomplete and therefore cannot be opened. When downloading the file with MOBI extension from the internet an error may occurred resulting in incomplete file. Try downloading the file again.

3. Check if the user that you are logged as has administrative privileges.

Sometimes in order to access files user need to have administrative privileges. Log out of your current account and log in to an account with sufficient access privileges. Then open the Mobipocket EBook file.

4. Verify that your device fulfills the requirements to be able to open Amazon Kindle

The operating systems may note enough free resources to run the application that support MOBI files. Close all running programs and try opening the MOBI file.

5. Verify that your operating system and drivers are up to date

Regularly updated system, drivers, and programs keep your computer secure. This may also prevent problems with Mobipocket EBook files. Outdated drivers or software may have caused the inability to use a peripheral device needed to handle MOBI files.

Do you want to help?

If you have additional information about the MOBI file, we will be grateful if you share it with our users. To do this, use the form here and send us your information on MOBI file.

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