Effortlessly view OST files on any platform with GroupDocs.Viewer Cloud.

GroupDocs.Viewer Cloud is a versatile document viewer platform that excels in providing seamless viewing capabilities for a variety of file formats on the .NET platform. With its intuitive API, developers can easily integrate the viewer into their applications and allow users to view a wide range of documents without the need for additional plugins or software installations. The platform’s user-friendly interface and responsive design ensure a smooth viewing experience across different devices and screen sizes.

When it comes to viewing OST files, GroupDocs.Viewer Cloud offers robust support for this specific format commonly used by Microsoft Outlook to store email data offline. Users can effortlessly render OST files directly in the cloud without the hassle of downloading them first. The platform’s advanced rendering capabilities ensure high-fidelity display of the content within OST files, allowing users to view emails, contacts, attachments, and other data with ease. This seamless integration of OST file viewing within the .NET platform streamlines the user experience and enhances productivity for developers and end-users alike.

Developers leveraging GroupDocs.Viewer Cloud for .NET applications can unlock the full potential of viewing OST files by customizing the viewer according to their specific requirements. With a wide range of configuration options available, developers can tailor the viewer’s functionality to suit their application’s needs and provide a tailored viewing experience for users working with OST files. The platform’s efficient processing of OST files combined with its flexibility in customization empowers developers to deliver a seamless and feature-rich document viewing solution within their .NET applications.


  • View OST Online via .NET or Free Online App
  • View OST Online via .NET or Free Online App
  • View OST Online via .NET or Free Online App
  • View OST Online via .NET or Free Online App
  • View OST Online via .NET or Free Online App
  • View OST Online via .NET or Free Online App
  • View OST Online via .NET or Free Online App

Effortlessly view OST files on any platform with GroupDocs.Viewer Cloud.

View OST and other Popular Formats for Free

VCFCDRHPGMHTMLCPPSPPSMMPTXMLICOPROPERTIESMHTFODGWMFDOCMJSONVDWPHPPYSCRIPTBZ2TARDGNCMAKENUMBERSPOTEMLXCCTGAJP2CXXXLSMHAMLHHDCMONECSVJPXJPMPLTLESSVSTXMODSEPUBPSDOXPSSVGHTMXZVSSMSGDOTMXPSXMLDNGVIMXLTMBOXTAR.GZMDSVGZWEBPSCMXLAMDWGMPXFODSPPTXPNGPS1OTTJ2KTSVVSSXPSTXLSBFODPVSTMTXTLOGPSBPPSXDOTXMAKEDIBCF2XLTXDOTMPPASMSMLVSTTIFFSCALATGZPDFGZODPHTMLXLTMOSTEMZPPTVTXJAVADWTNSFDOCXHBATDWFPOTMDIFFPSM1PSMLDXFVSSMCSSCPPOBJXLSAPNGVSDXGIFRTFAIBMPYAMLVSDSQLRSTJLSJPEGODTPOTXPLPPTMPCLSASSCGMRARJPGERBVSDMWMZEPSVSXVDXZIPJ2CSTLOTGEMLSXCMMEMFTAR.XZCMXSHAS3OTSCSOTP7ZTXZVBASJPFJPCTEXMOBIDOCTIFXLSXGZIPRBPSD1IGSGROOVYDJVUIFCCHMODGJS

How to view OST file online

  • Select the file by clicking the OST App or simply drag & drop a OST file.
  • Click the Open button to upload and view OST file.
  • That is all! You can view your OST document online.

Frequently Asked Questions

What is GroupDocs.Viewer Cloud?

GroupDocs.Viewer Cloud is a REST API for rendering and viewing various document formats in the cloud.

How does GroupDocs.Viewer Cloud work?

GroupDocs.Viewer Cloud works by allowing users to upload documents to the cloud and then retrieve rendered images or HTML for viewing.

What document formats does GroupDocs.Viewer Cloud support?

GroupDocs.Viewer Cloud supports a wide range of document formats including PDF, Microsoft Office documents, images, and more.

Is GroupDocs.Viewer Cloud platform-independent?

Yes, GroupDocs.Viewer Cloud is platform-independent and can be accessed from any programming language or platform.

Does GroupDocs.Viewer Cloud offer document customization options?

Yes, GroupDocs.Viewer Cloud provides options for customizing document rendering settings and output formats.

Is GroupDocs.Viewer Cloud suitable for displaying documents in web applications?

Yes, GroupDocs.Viewer Cloud is suitable for displaying documents in web applications with its flexible rendering options.

Does GroupDocs.Viewer Cloud provide support for document annotations?

Yes, GroupDocs.Viewer Cloud offers support for document annotations and redactions.

Can GroupDocs.Viewer Cloud be integrated with cloud storage services?

Yes, GroupDocs.Viewer Cloud can be integrated with various cloud storage services for seamless document handling.

Is GroupDocs.Viewer Cloud scalable for handling large volumes of documents?

Yes, GroupDocs.Viewer Cloud is scalable and can efficiently handle large volumes of documents for viewing.

What kind of authentication methods does GroupDocs.Viewer Cloud support?

GroupDocs.Viewer Cloud supports authentication methods like OAuth 2.0 for secure access to API resources.

OST Viewer REST API

View OST as HTML5

View OST as Images like BMP, PNG, JPEG & TIFF

OST REST APIs are secured and require authentication

View OST and hundreds of other formats from CAD, Word, PowerPoint, Excel, Email & eBook

Get OST document information like page & attachment count as well as properties

View OST as PDF

Rotate, reorder & watermark OST pages

View OST with its attachments

Multiple Document Formats

Supports a wide range of document formats including PDF, Microsoft Office, images, and more.

Cross-Platform Compatibility

Works seamlessly on various platforms like Windows, macOS, and Linux.

Cloud-Based Service

Utilizes the cloud infrastructure, enabling access from anywhere with an internet connection.

Document Rendering

Efficiently renders and displays documents with high fidelity and accuracy.

Customizable Viewer

Allows customization of the viewer interface to fit specific needs or branding requirements.

Secure Document Viewing

Ensures data security by providing secure document viewing without downloading files.

Document Comparison

Supports side-by-side document comparison for identifying changes or differences.

Page Manipulation

Enables users to manipulate document pages, such as rotating, rearranging, or deleting pages.

Search within Documents

Facilitates searching for specific content within documents to quickly locate information.

Responsive Viewing

Provides responsive viewing options for seamless display on various screen sizes and devices.

Support and Learning Resources

View OST using SDKs in other popular languages

  English