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OST to OTT converter

Convert OST to OTT online from any device with a free converter.

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We have already processed 8,914 files with total size of 18,799 Mbytes

About Conversion app

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 OTT 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.

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OST

Outlook Offline Storage File

An 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.

OTT

Open Document Template

The OTT file format is an OpenDocument Text Document Template used for creating standardized text documents with predefined formatting and layout. It is primarily supported by open-source office suites like LibreOffice and Apache OpenOffice, as well as other applications that adhere to the OpenDocument standard. The format is based on XML and allows for advanced features such as styles, macros, and embedded objects, making it highly customizable for creating reusable document templates.

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APIs available

Convert popular document and image file formats in your app. The GroupDocs.Conversion APIs are available for .NET, Java, and many other platforms and languages.

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How it works

How to convert OST to OTT

Step 1
Click inside the file drop area to upload OST file or drag & drop OST file.
Step 2
Click on Convert button. Your OST files will be uploaded and converted to OTT result format.
Step 3
Download link of result files will be available instantly after conversion.
Step 4
You can also send a link to the OTT file to your email address.
FAQ

Questions & Answers

Other Supported Conversions

You can also convert OST into many other file formats. Please see the complete list below.

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