XstReader is an open source viewer for Microsoft Outlook’s .ost and .pst files (also those protected by unknown password). You can view and inspect all content and export messages and attachments (also in .msg format). Written entirely in C#, with no dependency on any Microsoft Office components. This project is the evolution of Dijji's XstReader
active 2023-08-20 → 2026-07-29 (UTC)
Activity over time
Daily event counts in the loaded window
Line chart, 1075 days from 2023-08-20 to 2026-07-29. Pushes: 0 total, peak 0 in a day. Pull requests: 2 total, peak 1 in a day. Issues: 6 total, peak 1 in a day. Comments: 3 total, peak 1 in a day. Stars: 140 total, peak 3 in a day.
- Pushes
- Pull requests
- Issues
- Comments
- Stars
Stars, PRs, issues and forks are under-captured in the later part of this window. GH Archive progressively stopped capturing non-push events during 2026 — −95% or worse by the end of the window. Every series here except Pushes fades for that reason, so a decline above reflects the archive, not this repository. Pushes stay reliable throughout, so read them, and the contributor counts derived from them, as the real signal. Data health has the measurements.
Top contributors
Pushes, PRs, issues, reviews and comments — stars and forks excluded, so this is contribution rather than popularity
| Contributor | Contributions | Pushes | PRs | Comments |
|---|---|---|---|---|
| philiprodriguez | 2 | 0 | 1 | 1 |
| ruudsieb | 1 | 0 | 0 | 1 |
| MonoBuoy | 1 | 0 | 0 | 0 |
| PeetMcK | 1 | 0 | 0 | 0 |
| dtzuul | 1 | 0 | 0 | 0 |
| daviesj | 1 | 0 | 0 | 0 |
| CarlTierney | 1 | 0 | 1 | 0 |
| jevandusen | 1 | 0 | 0 | 1 |
| berkdemir | 1 | 0 | 0 | 0 |
| realzhipeng | 1 | 0 | 0 | 0 |
Recent activity
Latest issues, pull requests and releases
- Issue comment#28jevandusen2026-03-17 20:55Very slow parsing large .ost files due to DeflateStream CopyTo reading to end of file
- Issue comment#28ruudsieb2025-09-06 10:33Very slow parsing large .ost files due to DeflateStream CopyTo reading to end of file
- Issue comment#19philiprodriguez2025-05-18 16:28Unhandled Exception: Invalid Cryptographic Message Type
- Pull request#30philiprodriguez2025-05-18 16:22
- Pull request#29CarlTierney2025-04-25 21:21
- Issue#28dtzuul2025-03-17 22:45Very slow parsing large .ost files due to DeflateStream CopyTo reading to end of file
- Issue#27PeetMcK2024-08-28 18:47XstExporter 2.0.1 names every exported email the same name (#).
- Issue#26realzhipeng2024-08-08 14:56Exporter cannot find file
- Issue#23daviesj2024-07-01 18:21New "App" version can't handle large files.
- Issue#22berkdemir2024-03-21 09:30OST to PST
- Issue#19MonoBuoy2024-01-22 21:37Unhandled Exception: Invalid Cryptographic Message Type
Totals cover only the window loaded into ClickHouse and count events, not GitHub's lifetime totals — 140 stars here means stars gained during the window, not the repo's star count.