Is there any perfect app to open OLM file in Windows Outlook PST format without any hassle? Yes, directly go to install the amazing OLM to PST Tool which is the popular app to open OLM file in Windows Outlook PST format including all emails, contacts, calendars, and all other items. Outlook installation is not the important to perform this process. Using the program, anyone can open unlimited OLM files to PST format at once. The tool supports advance option of selecting PST format i.e. create separate PST file for each OLM file. Interested users can go with the free download edition of the software for freely use app to open OLM file in Windows Outlook PST format without any single charges. All Windows editions are suitable to use the program.