Open OST file online

Fast, secure and free OST viewer Online

Select ost file

Important: 150 MB maximum file size, all upload and processed files will be deleted automatically within 1 hours.

Open OST File

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Open Other OST File

OST Converter Online

Step 1

Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.

Step 2

Choose ost or any other format you need as a result (if applicable).

Step 3

Let the file process and download/view the ost file.
** You can also open your processed ost file in our free online viewer by clicking "Open".

1 ❓ How can I viewer OST file?
First, you need to add a file for viewer: drag & drop your OST file or click inside the white area for choose a file. Then click the "viewer" button. It will now allow you to viewer your OST file.
2 ⏱️ How long does it take to viewer OST file?
This viewerer works fast. You can viewer OST file in a few seconds.
3 🛡️ Is it safe to OST viewer using free file viewerer?
Of course! The download link of viewered file will be available instantly after processing. We delete uploaded files whithin next 24 hours and the download links will stop working after this time period. No one has access to your files. File viewerer (including OST). OST file viewerer is absolutely safe.
4 💻 Can I viewer OST file on Mac OS, Android or Linux?
Yes, you can use free viewerer app on any operating system that has a web browser. Our OST viewerer works online and does not require any software installation.
5 🌐 What browser should I use to viewer OST?
You can use any modern browser to viewer OST, for example, Google Chrome, Firefox, Opera, Safari.

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