Convert PST to OST Free — Online & Instant
Convert PST to OST — Free Online
Fast, secure, no software needed.
📁 Drag & drop your file here
or click to browse • Max 100MB
✅ Free • ⚡ Instant • 🔒 Secure • 💻 No install
How to Convert PST to OST
Converting .pst files to .ost is fast and simple with OpenAnyFile. PST is a email format: PST is Outlook Personal Storage Table for emails and contacts. OST is a email format: OST is an offline Outlook data file for Exchange accounts.
- Upload your .pst file to OpenAnyFile
- Select OST (.ost) as the target format
- Click "Convert" and wait for processing
- Download your converted .ost file
Why Convert PST to OST?
There are several reasons to convert from .pst to .ost:
- Compatibility: .ost may be more widely supported by software and devices
- File size: Converting between formats can reduce file size for easier sharing
- Editing: OST may offer better editing capabilities for your workflow
- Sharing: Recipients may prefer .ost files for their daily use
About PST Format
PST is Outlook Personal Storage Table for emails and contacts. Category: Email. Extension: .pst. Created by: Microsoft.
About OST Format
OST is an offline Outlook data file for Exchange accounts. Category: Email. Extension: .ost. Created by: Microsoft.
Frequently Asked Questions
How do I convert .pst to .ost?
Upload your .pst file to OpenAnyFile, select OST as the target, and download the converted file.
Is PST to OST conversion free?
OpenAnyFile offers free file analysis. Conversion may require a one-time payment depending on the file.
Will I lose quality converting .pst to .ost?
OpenAnyFile preserves maximum quality during conversion. Some format-specific features may not transfer between different file types.
Can I convert .ost back to .pst?
Yes, you can convert .ost to .pst using OpenAnyFile as well.