PstViewer Pro™ - View Outlook .OST Files

.OST File Viewer

Opening Microsoft Outlook .OST & .PST Files

View and search Outlook .OST, .PST emails

PstViewer Pro manages the contents of multiple Microsoft Outlook .OST, .PST file, accurately rendering the most complex emails, including Rich Text messages with embedded graphics and special formatting such as shapes, SmartArt and charts, without Outlook or MAPI.

Screen image showing PstViewer Pro with a .ost email file open.


  • Opens all Outlook .OST and .PST files (98/2000/XP/2003/2007/2010/2013/2016/2019/365)
  • Opens Outlook .msg files (rich text, text, and html)
  • Opens .eml files
  • Open password protected .pst files without a password.
  • View Outlook .msg email files (including OLE embedded objects) without MAPI or Outlook
  • View .msg files formatted as Outlook notes, tasks, calendar items, contacts
  • View .eml RFC-822 email files
  • Search emails based on advanced criteria Export emails to PDF.
  • Can optionally embed attachments within PDF, or convert attachments to PDF content.
  • Reply and Forward using your default email client
  • Search email fields including Message Text, From, To, CC, Subject, Date Range, Header
  • Reads Messages stored in Recursive Directories
  • Reads Messages stored in a Read-Only state
  • View Internet header
  • View MAPI properties
  • Export email file attachments
  • Batch select up to thousands of emails for print or export operations
  • Auto-extract file attachments
  • Print selected emails Renders Rich Text, HTML or Text
  • Copy selected emails
  • Export emails to PDF, MHT, HTML, TXT, JPG,TIF, CSV, PNG, BMP
  • Favorites list (locations or files)
  • Set as default for .msg or .eml
  • Silent Installation from command line
  • Print from command line
  • Convert from commandline (msg/eml to PDF or other formats)
  • Configurable user interface
  • Apply flexible criteria to file names during export operations
  • Set text viewing as default
  • Language Menu Support for English, French, Italian, German, Russian, Polish, Portuguese.
  • Site licenses, White Boxing, Special Licensing and Product Customization available.
Download a free trial of Pst Reader

PstViewer Pro requires Windows10/8/7, .Net Framework 4.5 or later, 1 GB RAM, 100 MB disk space, and 1 Ghz processor.

For more information, contact our sales team at +1.651.815.4902 x1 or email sales at For product assistance, please open a help ticket.