AZW4 to MOBI Converter

Convert AZW4 to MOBI online, for free.



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Default
Optimizes layout and formatting for a specific e-reader. Choose the one that matches your device.
No
Attempts to detect and correct common styling problems in the source file. Experimental, so check the output before relying on it.
Enter margin in cm (0 - 10)
No Change
The base font size is the size of the bulk of the text in your document. Set it and we rescale every font size proportionately, so the most common size becomes your chosen value and headings, captions, and other text scale with it. Select "No Change" to keep the original sizes.
Replaces Unicode characters with their closest ASCII equivalents, for readers that cannot display accented or non-Latin text.
Auto
Helpful for eBooks without an encoding declaration or declare an erroneous one. This option will override existing encoding declarations.
Enter Title, maximum 100 characters
Enter Author Name, maximum 100 characters


How to Convert AZW4 to MOBI?

  1. Click the “Choose Files” button to select your AZW4 files.
  2. Click the “Convert to MOBI” button to start the conversion.
  3. When the status change to “Done” click the “Download MOBI” button

Easy to Use

Simply upload your AZW4 files and click the convert button. You can also batch convert AZW4 to MOBI format.

Best Quality

We use both open source and custom software to make sure our conversions are of the highest quality. In most cases, you can fine-tune conversion parameters using “Advanced Settings” (optional, look for the icon).

Free & Secure

Our AZW4 to MOBI Converter is free and works on any web browser. We guarantee file security and privacy. Files are protected with 256-bit SSL encryption and automatically deleted after 8 hours.


Kindle Print Replica (AZW4) is an Amazon e-book format that wraps a PDF inside a Kindle container. Rather than reflowing text to fit the screen, it preserves the exact page layout of the printed edition, which is why Amazon uses it for textbooks, technical manuals, and heavily illustrated titles where equations, diagrams, and page numbering must stay put. The trade-off is that you cannot change the font size, so AZW4 reads poorly on small screens.

 

How to open an AZW4 file?

Print Replica books are meant for the Kindle apps on tablets and computers, where the larger display suits fixed pages. Sign in to the Kindle app on Windows, macOS, Android, or iOS and the title appears in your library.

 

Basic e-ink Kindles cannot display Print Replica books at all. Calibre can open DRM-free AZW4 files and extract the underlying PDF, which is often the most practical way to read or print one on a desktop computer. You can also convert the file with our AZW4 to PDF tool.

 

Developed by: Amazon.com, Inc.

Initial Release: 2011


Mobipocket eBook (MOBI) is an e-book format built for handheld devices, storing text as compressed HTML so that it reflows to fit small screens. Amazon bought Mobipocket in 2005 and made MOBI the foundation of the original Kindle format. It supports bookmarks, annotations, and a table of contents, but not the complex layouts or embedded fonts that EPUB allows. Amazon retired MOBI support in 2022.

 

How to open a MOBI file?

Calibre is the most capable option: it reads MOBI, manages your library, and converts between every common e-book format.

 

Older Kindle e-readers and the Kindle desktop app still open MOBI files copied over USB, and mobile apps such as FBReader and Moon+ Reader handle them too. Because Amazon’s Send to Kindle service no longer accepts MOBI, converting your library with our MOBI to EPUB tool is worth doing.

 

Developed by: Mobipocket SA, later Amazon.com

Initial Release: 2000

FreeConvert.com can convert your other files to MOBI format:

FreeConvert.com can convert your AZW4 files to these other formats:


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