Guide - Thunderbird Converter Wizard

Step by Step Guide to Convert Thunderbird Emails to Multiple Destinations like : PST, MBOX, CSV, Lotus Notes, Zimbra , Outlook for Mac Archive (OLM), MSG EML, EMLX, TXT, HTML, MHT, XPS, RTF, DOC, Windows Live Mail, PDF, Maildir, Gmail/ G Suite , Yahoo,, Office 365 , Exchange Server & other IMAP Servers


First screenshot of this product, describes steps to convert Thunderbird emails.

start the tool


Software provides multiple options to load emails in software panel i.e.

I want to convert my Thunderbird data :

  • Convert Emails
  • Contacts and Calendars

Select file

Selecting Option : Convert Emails

  • Convert configured Thunderbird mailboxes data : This option helps users to automatically detect the location of Mozilla Thunderbird Profile / Account configured in Mozilla Thunderbird from its default location. Using this Thunderbird Converter Wizard helps to easily locate & export Thunderbird mailbox data in the desired format
  • Let me select my Thunderbird Mailboxes data : This option helps users to Select Thunderbird Profiles Folder or Thunderbird files using options Select Folder (allowing users to upload & convert multiple Thunderbird Folders at once ) & Select Files (allows users to select single Thunderbird emails).

Select file

Select Thunderbird Folders & Click on Select Folder

Select file

Previewing location of selected file (s), click on Next.

Location of selected file


Selecting Option : Contacts & Calendars

Under this option you can Select Thunderbird Contacts ( exported in .csv) or Calendars ( exported in .ics) files. This will allow you to:

  • Select Folder : It enables users to upload & convert multiple Thunderbird Contact / Calendar within a Folders at once)
  • Select Files : It enables users to select single Thunderbird Contact / Calendar ). How to Export ?

Select file

Select CSV or ICS file and click on Open button.


Previewing location of selected file (s), click on Next.

Location of selected file


The Thunderbird Converter software displays all Thunderbird Profile folders before conversion. This option is helpful to the users who need to migrate selective Folders from Thunderbird File. Then Click on Next Button.

Previewing email folders


Select from the following saving options:

  • PST
  • MSG
  • EML
  • EMLX
  • TXT
  • MBOX
  • HTML
  • MHT
  • XPS
  • RTF
  • DOC
  • Windows Live Mail
  • CSV
  • Gmail
  • Yahoo
  • PDF
  • Lotus Notes
  • Zimbra
  • Maildir
  • Thunderbird
  • Outlook for Mac Archive (OLM)
  • Office 365
  • Exchange Server
  • G Suite
  • IMAP

Choose Office 365


Settings according to User Preferences depending on the saving option:

For PST, MBOX, CSV, Lotus Notes, Zimbra , Outlook for Mac Archive (OLM) :

Simply Select the Destination Path & Save the Thunderbird file in desired system Location

Choose Office 365

For MSG EML, EMLX, TXT, HTML, MHT, XPS, RTF, DOC, Windows Live Mail, PDF, Maildir:

  • File Naming Option : Thunderbird Converter software offers multiple file naming options to store converted data in different universal formatting. It offers file naming options like Original File Name, Subject + Date (dd-mm-yyyy), From + Subject + Date (yyyy-mm-dd),From + Subject + Date (dd-mm-yyyy), Date (dd-mm-yyyy) + From + Subject, Date (yyyy-mm-dd hh:mm:ss) + From + Subject,Date (yyyy-mm-dd hhmm), From +Date (yyyy-mm-dd hhmm), Date (mm-dd-yyyy) +Subject + From, Date (yyyy-mm-dd) +From + Subject, AutoIncrement.

Choose Office 365

For For Gmail, Yahoo, :

For this, you need to provide only Gmail / G suite Credentials i.e email address & password. Also make sure that you enable IMAP & Less Secure Apps in Settings . Know How to do it here

Choose Office 365

For Office 365 & Exchange Server : You need to enter the following details :

  • Change Language: Allows users to change the O365 folder 's language to 9 distinct languages: English, Dutch , French, German , Spanish, Swedish, Norwegian, Italian, Finnish. If Language is chosen as German, for example, the folder name would be changed from “Task” to Aufgaben, Inbox as Posteingang.
  • I am Admin : If you are Office 365 Administrator Select option "I am Admin" & enter Enter Office 365 Administrator Username & Password. Using this option you can you to perform User- Mailbox Mapping ( ie. Export Different Thunderbird data files / folders to Different Office 365 User Account.)
  • Office 365 Email & Password : If You are general Office 365 User , You need to enter Office 365 Username & password to export Thunderbird mailbox emails into Office 365 Account
  • Copy to Default Folder : This choice enables Thunderbird data to be combined with current Office 365 directories. If you uncheck this option, Thunderbird emails with an entirely new folder with exported date & time will be migrated to Office 365 Webmail. E.g.: 23-09-2020 11-05.
  • Exchange Server Name

Choose Office 365

For IMAP :

You can convert Thunderbird mailbox data to any IMAP Server such as, Zoho mail iCloud, .Me or .Mac, XFINITY, 1and1 Email, Windows , COX, Rackspace, Fastmail, Comcast etc. For this you need to provide Email Address, Password, IMAP Host , IMAP Port No. for required conversion. For example for zoho enter your email address & Password , Enter IMAP Host :, Port No. 993

Choose Office 365


Then Check the destination Location to find the Exported / Converted Thunderbird data.

Importing files