Try SysTools Gmail Backup tool to export Gmail emails, contacts, calendars and Google drive storage files into multiple file formats. This tool also takes the backup of Google Docs / Spreadsheets / Slides / Images. For more info, visit its official website: https://www.systoolsgroup.com/gmail-backup.html
SysTools MBOX Converter - SysTools MBOX Converter tool repair & extract all email attachments from Mbox file & convert into data items of other email client application on Windows Platform.
Gmvault - Backup the emails in your Gmail account.
BitRecover MBOX Converter - Convert MBOX files of Thunderbird, Apple Mail, Eudora Mail, SeaMonkey, Google Takeout, etc. The tool offers 30+ output options like PST, EML, MBOX, MSG, EMLX, TXT, CSV, RTF, Thunderbird, Zimbra, Gmail, Yahoo, Microsoft 365, and Exchange Server.
MailStore - MailStore Home - A 100% free single-private-user desktop solution
ReliefJet Essentials for Outlook - A large set of useful and easy-to-use tools for every Microsoft Outlook user: Import, export and convert using EML,MSG,TXT and PST formats; remove duplicate items, process attachments and extract addresses; get reports and statistics and even more...
Got Your Back - Got Your Back (GYB) is a command line tool that backs up and restores your Gmail account.