How do I convert OLM file to MBOX format including all attached files? Are you also searching for a solution to this query, then download OLM to MBOX Converter. It is simply designed tool that allows both technical and non-technical users to easily convert OLM file to MBOX. Using its batch mode option, one can convert OLM file to MBOX in unlimited numbers at once. The software also provides preview option and advance filters to help users convert OLM file to MBOX format, selectively. Free demo tool is also available to help users understand how to convert OLM file to MBOX with attachments. Using free demo they can also convert first 25 emails per OLM file to MBOX, as free trial.