Thunderbird Fix It is the ultimate utility to maintain your Thunderbird's local folders. You can use Thunderbird Fix It to recover deleted messages, remove duplicate messages, backup local folders, compact folders and to remove attachments of your saved emails.

The program works on Windows 2000, Windows XP, Windows Vista and Windows 7.


Thunderbird Fix It allows you to perform the following operations.
  • Recover messages that you have accidentally deleted, even if you have also deleted them from Trash.

  • Remove attachments from saved emails to save disk space.

  • Find and remove duplicate emails

  • Compact selected folders

  • Delete Thunderbird's index files and Windows' search files to save disk space.

  • Backup of Thunderbird's local folders in zip files for easy access.

All of the above operations can be performed in all your Thunderbird's local folders or in selected folders and their subfolders. Unlike many other programs and add-ons, Thunderbird-Fix-It has been designed to be able to handle very large message folders (there is no 2GB folder size limit).


Click on the thumbnail for a full-sized image.



Free download/install

Thunderbird Fix It, as of version 1.1, is freeware. Download/Install the latest version (v2.2) In order to install Thunderbird Fix It on your system, you have two options: Automatic installation (setup wizard) and manual installation (zip file).

Automatic Installation (recommended method)

In order automatically setup Thunderbird Fix It (with the setup wizard) follow the instructions below:
  1. Download 100dof_thunderbird_fix_it_setup.exe and save in a temporary folder.
  2. Run 100dof_thunderbird_fix_it_setup.exe to start the setup wizard
  3. Select the desired installation settings, and click 'install' to start installation.
  4. You will be prompted to read/accept the licence agreement and also to provide installation options. You may accept the default settings or change them as you wish.

Manual installation from a zip file (portable edition)

In addition to the automatic installation procedure described above, all necessary files are also offered in the form of a zip file that you can download and decompress in a convenient place. If you wish you can also make shortcuts in your startup menu.


The software of 100dof is listed in all popular download sites. It has been reviewed by the editors of some very popular blogs and it has been awarded with numerous "five-star" and "best-software" awards. But, above all, our software has very satisfied users, something that we are very proud of. Check here what our users have to say.

Freeware Disclaimer

Thunderbird Fix It v1.1 is freeware. The author, of this software accepts no responsibility for damages resulting from the use of this product and makes no warranty or representation, either express or implied, including but not limited to, any implied warranty of merchantability or fitness for a particular purpose. This software is provided "AS IS", and you, its user, assume all risks when using it.

Privacy Policy

This app does not communicate any information (personal or not) to us. Moreover, we do not collect any personal information. If you send us an email (e.g. for support or feedback) we will keep your email for future correspondence but we will not share any information contained in this email and we will not use your email address to spam you

Contact and feedback

Please, feel free to send comments and feedback at the following email address:

Alternatively, you can use our contact form.