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Auto Compress File For Thunderbird: Quickly Compresses Files

Joshua Lockhart 10-05-2013

File compression is often just an extra annoying task in the process of sending memory-heavy items. Wouldn’t it be easier if you could just skip this step and have files compress themselves within the mail client itself? With Auto Compress File for Thunderbird Get The Most Out Of Your Email With Mozilla Thunderbird 5 Mozilla's at it again. Not only has Firefox been upgraded to version 5, but so has Thunderbird. In fact, in order to keep up with the new version and development scheme that it has set... Read More , you can do just that.


The extension works seamlessly with your email routine and can be set to automatically compress files to ZIP folders whenever you attach them. If you prefer otherwise, you can manually handle things, and you can also set thresholds to determine what file sizes permits automatic compression.

Furthermore, the app is highly customizable. You can even set the time to display the manual compression prompt: (send now, later or in background, save as draft, template, or automatically as draft).

compress files thunderbird

To prove just how much you can personalize Auto Compress File, the app even lets you determine what color compressed files should have while in the attachment pane. Even better, you can actually whitelist and blacklist who you should compress files for (a courtesy based on others’ Internet connections).

auto compress file


Practically speaking, Auto Compress File is perfect for those of you who send large files or copious amounts of files at one time on a regular basis. Seeing that it will save time by removing the need for a third party compressor and functions as part of Thunderbird itself, this app is definitely a must-download.


  • Automatically compresses files in Thunderbird.
  • Bases compression on file sizes.
  • Features recipient whitelist/blacklist.
  • Filters for file names and file extensions.
  • Adds comments to ZIP file.
  • Allows you to skip compression for some files.
  • Enables character replacement.

Install Auto Compress File for Thunderbird.

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