OST to PST Converter

Batch convert ost files to pst format online for free

Choose files or drag & drop them here.
Only you have access to your files.
All files will be deleted after one hour.

How to convert OST files to PST online?

Step-by-step guide to convert ost to pst using AnyConv. It works on PC (Windows, Mac, Linux) and mobile devices (iPhone, Android).

Upload OST-file

Drag and drop your OST file into the upload area. The maximum file size is 100 MB.


Click "Convert" to change ost to pst. The conversion usually takes a few seconds.

Download your PST

Now you can download the PST file. The download link only works on your device.


  • ❓ How can I convert files from OST to PST?
    First you need to add file for conversion: drag and drop your OST file or click the "Choose File" button. Then click the "Convert" button. When OST to PST conversion is completed, you can download your PST file.
  • ⏱️ How long does it take to convert OST to PST?
    Document conversion is pretty fast. You can change OST to PST in a few seconds.
  • 🛡️ Is it safe to convert OST to PST on AnyConv?
    Of course! We delete uploaded files immediately, and converted ones after 1 hour. No one has access to your files. File conversion (including OST to PST) is absolutely safe.
  • 💻 Can I convert OST to PST on Mac OS or Linux?
    Yes, you can use AnyConv on any operating system that has a web browser. Our OST to PST converter works online and does not require software installation.

Information about OST and PST file formats

🔸 File format OST PST
🔸 Full name Off-line Storage Table Personal Storage Table
🔸 File extension .ost .pst
🔸 MIME type application/octet-stream application/octet-stream
🔸 Developed by Microsoft Microsoft
🔸 Type of format
🔸 Description OST is a file created by Microsoft Outlook. OST is used to store a copy of mailbox information from an Office 365, Exchange, or Outlook.com account. For example, OST files may contain email messages, contacts, tasks, calendar data, and other account information. OST files are very similar to the PST personal folder files but do not support large file sizes. PST file is a data storage file that contains personal information used by Microsoft Outlook and Exchange. PST may also include email folders, contacts, addresses, and other data. PST files have a 2GB limit and will cause Outlook to slow down when the file is close to the limit.
🔸 Technical details
🔸 File conversion OST conversion PST conversion
🔸 Associated programs Microsoft Outlook Microsoft Outlook
🔸 Wiki https://en.wikipedia.org/wiki/Personal_Storage_Table https://en.wikipedia.org/wiki/Personal_Storage_Table