Windows
Compatible Applications
What is a .pst file?
File Extension Details
A PST file, which stands for Personal Storage Table, is a proprietary file format developed by Microsoft to store local copies of messages, calendar events, and other items within Microsoft software such as Microsoft Outlook, Microsoft Exchange Client, and Windows Messaging. These files are primarily used to archive older emails or to keep a local backup of mailbox data that exceeds server storage limits. Unlike OST files, which are offline caches of server data, PST files are independent and can be moved between different computers or stored on external drives. They contain a structured database of folders, including the Inbox, Sent Items, Drafts, and custom user-created folders, along with attachments, contacts, tasks, and notes. Over the years, the format has evolved from the older ANSI format, which had a 2GB size limit, to the modern Unicode format used since Outlook 2003, which supports much larger file sizes, typically up to 50GB by default. Managing PST files is crucial for enterprise data retention and personal email organization, though they are prone to corruption if the file size becomes excessively large or if the network connection is interrupted during access. Because it is a proprietary format, opening PST files usually requires specific Microsoft software or specialized third-party conversion tools.
Software Compatibility
Programs that can open and work with .pst files
macOS
Compatible Applications
Linux
Compatible Applications
Mobile
Mobile Applications
Frequently Asked Questions
About .pst files
To open a .pst file, you need compatible software. Here are some options:
- Microsoft Outlook
- SysTools PST Viewer
- Microsoft Outlook for Mac
- Evolution
To convert a .pst file to another format, you can:
- Use compatible software Many programs that open .pst files also allow you to save or export them to different formats.
- Try online conversion services: Websites like Zamzar, CloudConvert, or Online-Convert allow you to convert files between different formats without installing software.
- Specialized conversion tools: Search for '.pst converter' to find tools specifically designed for this file type.
- Verify the file extension is correct:
- Update your software:
- Try alternative software:
- Check for file corruption:
Like any file type, .pst files can be safe or potentially risky depending on their source:
- Always scan files with antivirus software before opening
- Keep your operating system and applications updated.
- Be especially cautious with executable file types
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