View OST Online

Open and view OST documents online from any device for free.

OST Outlook Offline Storage File

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.

Learn more about Outlook Offline Storage File

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Free Document Conversion, Viewer, Merger app for Windows

Free Document Conversion, Viewer, Merger app for Windows

  • Easily convert, view or merge unlimited files on your own Windows PC.
  • Process Word, Excel, PowerPoint, PDF and more than 100 file formats.
  • No limit on file size.
  • Batch conversion of multiple files.
  • One app with rich features like Conversion, Viewer, Merger, Parser, Comparison, Signature.
  • Regular FREE updates with new features coming every month.
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How to view OST files online

How to view OST files online

  • Click inside the file drop area to upload a OST file or drag & drop a OST file.
  • Once upload completes, you'll be redirected to the viewer application.
  • Scroll down or use the menu to navigate between pages.
  • Zoom-in or zoom-out page view.
  • Download source file pages in PNG or PDF format.

FAQ

  • ❓ How can I open and view OST file?
    First, you need to upload a file: drag & drop your OST file or click inside the white area to choose a file. Then you will be redirected to the viewer application.
  • ⏱️ How long does it take to open OST file?
    The viewer app works fast. Typically it takes a couple of seconds to open a OST file.
  • 🛡️ Is it safe to view OST files using free GroupDocs Viewer?
    Of course! The preview files will be available instantly after the file uploaded. We will delete the uploaded file after 24 hours.
  • 💻 Can I open & view files OST on Linux, Mac OS, or Android?
    Yes, you can use the free GroupDocs Viewer on any operating system that has a web browser. Our OST viewer works online and does not require any software installation.
  • 🌐 What browser should I use to view OST files?
    You can use any modern browser to view OST files, for example, Google Chrome, Microsoft Edge, Firefox, Opera, or Safari.
  • </> What code is running on the server-side to render OST files?
    Detailed code examples are available at GitHub in the form of executable projects. If you are only interested in rendering OST files then check .NET & Java examples.

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