Mailbox RescueFree PST viewer for Windows
Mailbox Rescue is a free PST viewer: it opens Outlook .pst files of any size, shows the folder tree and every message, searches all folders at once and saves attachments. It runs on your PC without Outlook and without uploading anything.
Screenshots use the public EDRM Enron Email Data Set by ZL Technologies, Inc. (zlti.com), licensed under CC BY 3.0 US.
What the free PST viewer includes
- Every folder, with the message count each folder records
- Message list sorted by date, with sender and subject
- Message preview with sender, recipients, date and attachments
- Search across all folders by subject, sender or recipient
- Save any single attachment
- Export the first 25 messages to test the result
When do I need the full version?
When you want to export the whole mailbox (all messages and attachments, to EML, MBOX, CSV or attachment files). The full version is $9.99 once.
Windows 10 and 11, Intel/AMD and ARM. No account needed. Works offline.
Frequently asked questions
Do I need Outlook or a Microsoft 365 subscription?
No. Mailbox Rescue reads PST, OST and MSG files directly. Outlook does not need to be installed, and no Microsoft account or subscription is needed.
Is my mailbox uploaded anywhere?
No. Everything happens on your PC. The only thing the app ever sends over the internet is your licence key when you unlock the full version.
What does the free version do?
It opens, searches and shows every message, and saves single attachments, without limits. Bulk export stops after 25 messages so you can check the result before you buy.
Is it a subscription?
No. The full version is $9.99 once and works on up to 3 PCs.
Updated 2026-11-08