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Convert your OST files online—no registration needed. No matter your platform—Windows, Linux, or macOS—you can convert your OST documents rapidly. Drag and drop your file onto the upload form, pick the output format you need, and hit the convert button. After the conversion is finished, download your ODT file instantly.
Conversion time varies based on the OST file's size and complexity, but most files convert within seconds. Our advanced options include converting secured documents and delivering conversion results straight to your inbox.
Easily convert your OST documents from any location and any device, even on mobile. This conversion app is always accessible online and free for basic use.
Check our videoAn OST (Outlook Offline Data File) is a file format used by Microsoft Outlook to store a synchronized copy of mailbox data locally, enabling offline access to emails, calendars, contacts, and other items. It is primarily used by Microsoft Outlook and can be accessed or converted using tools like Kernel OST to PST Converter, Stellar Converter for OST, and SysTools OST Viewer. The OST file structure is based on the Messaging Application Programming Interface (MAPI) and supports advanced features like synchronization with Exchange Server, encryption, and data compression for efficient storage and security.
The ODT format is an open standard file format for word processing documents, developed by the Organization for the Advancement of Structured Information Standards (OASIS). It is supported by various applications, including LibreOffice, Apache OpenOffice, and Microsoft Word (with compatibility plugins), making it a versatile choice for cross-platform document creation and editing. The format is based on XML and ZIP compression, allowing for structured data storage, support for advanced features like styles, metadata, and embedded objects, and ensuring interoperability across different software environments.
You can also convert OST into many other file formats. Please see the complete list below.