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Convert your OST files online. You can convert your OST documents from any platform (Windows, Linux, macOS). No registration needed. Just drag and drop your OST file on upload form, choose the desired output format and click convert button. Once conversion completed you can download your AZW3 file.
You even can perform more advanced conversions. For example you can convert password protected documents. Just expand LoadOptions and enter the password of your file. Or you can add a watermark to the converted AZW3 file. Expand the ConvertOptions and fill the fields for watermarking.
You can convert your OST documents from anywhere, from any machine or even from a mobile device. The OST converter is always available online and is completely free.
OST or Offline Storage Files represent the user's mailbox data in offline mode on the local machine upon registration with Exchange Server using Microsoft Outlook. It is automatically created on the first use of Microsoft Outlook upon connectivity with the server. Once the file is created, the data is synchronized with the email server so that it is available offline as well in case of disconnectivity from the email server.
Read moreAZW3, also known as Kindle Format 8 (KF8), is the modified version of the AZW ebook digital file format developed for Amazon Kindle devices. The format is an enhancement to older AZW files and is used on Kindle Fire devices only with backward compatibility for the ancestor file format i.e. MOBI and AZW.
Read moreYou can also convert OST into many other file formats. Please see the complete list below.