Hii, for converting your OLM files use DRS OLM Converter is a top tool for converting your OLM file to other file formats such as MBOX, CSV, EML, HTML, PDF, etc. This tool is very easy to run and download too, allowing you to remove all duplicate mail in Gmail. This software is adaptable to all the outlook versions.

DRS Thunderbird Backup Tool is a very easy to run tool for the user. Users can easily save Thunderbird mailboxes data into MBOX, PST, OST, and many other file formats. This tool also migrates mailbox data into Gmail, Yahoomail, etc. If you have any trouble at the time of the backup you can read the instructions. This tool also provides a free demo version.