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I had a huge, problematic file to convert that couldn't go through the usual automated conversion process. The Zamzar team responded quickly to my request for help, and they took the extra steps needed to do it manually.


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I have been so thankful for Zamzar’s support from the beginning of the Pandemic to the present day. Their service is first rate & their helpfulness is always the best it could be.


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It’s my first time using it. I had some complications doing it. I’m not very good at this. But I wrote to the company and I had a lot of help. I’m satisfied with customer service and with the app.

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I use Zamar whenever I need to convert audio and video files from multiple submitters to 1 uniform file format for Audio and Video Editing. I can do multiple large files in a short amount of time.

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Fantastic service! My mom's computer died and she has 1000+ Word Perfect files she wants to keep for some reason. Since Word Perfect is basically dead, I decided to convert all her files. Zamzar's converter was perfect.

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Employees of some of the world’s most well-known brands rely on Zamzar to convert their files safely and efficiently, ensuring they have the formats they need for the job at hand. From global corporations and media companies, to respected educational establishments and newspaper publications, employees of these organisations trust Zamzar to provide the accurate and reliable conversion service they need.

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From your personal desktop to your business files, we've got you covered

We offer a range of tools, to help you convert your files in the most convenient way for you. As well as our online file conversion service, we also offer a desktop app for file conversions straight from your desktop, and an API for automated file conversions for developers. Which tool you use is up to you!

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Tools to suit your file conversion needs

You’ll find all the conversion and compression tools you need, all in one place, at Zamzar. With over 1100 file-conversion types supported, whether you need to convert videos, audio, documents or images, you’ll easily find what you need and soon have your files in the formats and sizing that work for you.

AZW3 eBook Format

AZW3 Converter

An AZW3 file format is also known as an Amazon KF8 e-Book file and was developed by Amazon to replace the older AZW file. AZW3 files are similar to AZW files in that they’ve been designed for the Kindle so that they support formatting, chapter markers and so on. Just like the AZW file they also have DRM protection built in meaning they can only be opened by Kindle devices – i.e. devices that are authorised to open these files. This DRM protection is Amazon’s way of trying to prevent piracy occurring and books being shared without people paying for them. The key difference between AZW3 and AZW is around AZW3’s ability to support HTML5 and CSS3 which means that these files are a lot more advanced when it comes to formatting including being able to support illustrations. As more and more new generation Kindles get sold the AZW3 format is becoming increasingly popular. To open an AZW3 file a user must have a Kindle or use a program called Calibre.

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MOBI eBook Format

MOBI Converter

A MOBI file has a full name of Mobipocket e-book and is an e-book file format that has been developed by Amazon and are the basis of the file formats used by all Amazon Kindle devices. A MOBI file differs from the other popular e-book format, epub, in that it is protected by Digital Rights Management which essentially pins the book down to just the one device so it can’t be used if not registered to the users account.

MOBI file formats have provided the basis of the recently created KF8 file format which are used in the most recent Kindle formats. As e-books and e-readers become more popular, the MOBI format’s use has largely fallen away but it is still the base on which many of the more modern e-book formats are based including AZW and AZW1.

Programs that can open a MOBI file format include the Kindle and and the tool Calibre.

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How to convert a AZW3 to a MOBI file?

  1. 1. Choose the AZW3 file that you want to convert.
  2. 2. Select MOBI as the the format you want to convert your AZW3 file to.
  3. 3. Click "Convert" to convert your AZW3 file.

Convert from AZW3

Using Zamzar, it is possible to convert AZW3 files to a variety of other formats:

AZW3 to EPUB AZW3 to FB2 AZW3 to OEB AZW3 to LIT AZW3 to LRF AZW3 to MOBI AZW3 to MP3 AZW3 to PDF AZW3 to PDB AZW3 to PML AZW3 to PRC AZW3 to RB AZW3 to TCR AZW3 to TXT

Convert to AZW3

Using Zamzar, it is possible to convert a variety of other formats to AZW3 files: