Various third-party software are available online to convert free OLM to PST format but most of them do not provide desired results. Download Kernel for OLM to PST Converter. It can accurately convert both healthy and corrupt OLM files to Outlook PST format. Its free demo version can recover corrupt OLM files and converts 25 recovered OLM items from each folder to PST format. You can purchase the software to save unlimited OLM items.