A while ago I needed something to convert a 5GB Outlook OST file to PST format. Turned out Aspose has a good (commercial) API/library for Java to do exactly that. I had not touched Java for 10 years but got things sorted within a few hours thanks to clear instructions and good examples and docs. I just used the example and made minimal changes, nothing more.
Get files below or from Releases page
- Main executable: ost2pst.jar verify: SHA512SUMS
- Windows batch file: ost2pst.bat
- Linux/BSD shell script: ost2pst.sh
- If needed download Java here: JRE8 or alternatively: JavaSE-RE-8
Windows: ost2pst.bat <input.ost> <output.pst> (same for .sh)
- you can also run the jar directly:
java -jar ost2pst.jar - the jar needs JRE8
- Saving to Outlook 2013/2016 PST files is not supported
C:\src\ost2pst>ost2pst.bat input.ost output.pst
OST2PST (200316)
INFO: Loading OST file "input.pst" (5GB)
Folder [00] "Public"
Folder [01] "Inbox"
Folder [02] "Outbox"
Folder [03] "Sent Items"
INFO: File format is "64-bit Unicode" (23)
INFO: Converting "input.pst" to "output.ost" 511MB/4751MB (11%) |- show file format info
- exits instead of trying to save outlook 2013+ files
- jar also builds in maven now
- error handling, added notice about outlook '13/16 files
- updated aspose-email lib to 20.2
- fixed (visual) error before convertion
- improved messages and progress indicator
- updated aspose-email lib to 19.12
- improved progress indicator
- updated aspose-email lib to 18.8
Import into Eclipse:
- GitHub Aspose Email-for-Java
- docs.aspose.com Installation (Maven)
- docs.aspose.com Aspose.Email java for Eclipse (Maven)
- use Ant to 'Export', 'Java', 'Runnable JAR file' (used for ost2pst.jar)
- or alternatively use Maven to build project
Aspose.Email for Java: https://products.aspose.com/email/java
What lead me to Aspose: http://wiki.opf-labs.org/pages/viewpage.action?pageId=25887031
Possible alternative https://github.com/rjohnsondev/java-libpst
moved from old repo mkorthof/Aspose.Email-for-Java