Muttator is a free add-on for the Thunderbird mail client, which makes it look and behave like the Vim text editor. It has similar key bindings and you could call it a modal mail client, as key bindings differ according to which mode you are in. For example, the same key can select the next message while the message list has focus or can scroll down an existing message when the message preview is selected. It also adds commands for accessing most Thunderbird functionality - e.g. :contact -firstname Martin -lastname Stubenschrott will add a new contact with my details.

But Muttator is more than just a simple command interface to Thunderbird — it is a complete development environment as well. If you are a web developer, you can enjoy an interactive JavaScript shell — even with completion support. Or if you want to extend Muttator, you can easily do that by just dropping a JavaScript file in its plugin directory. Browse through our wiki pages for nice tips to customize Vimperator and for frequently asked questions. If you have more questions, you can visit us on IRC, in #vimperator on freenode.


Muttator was initially written by Martin Stubenschrott and has found many invaluable contributers who helped out fixing bugs and adding new features.

If you appreciate the work on Muttator and want to encourage us working on it more, you can send us greetings, patches, or donations:

Make a Donation Make a Donation

If you rather prefer getting some nice products for your money, you can also support us by buying some cool merchandise like t-shirts or mugs. Of course, as we believe in free, open source software, only support us financially if you really like Vimperator and the money doesn’t hurt — otherwise just use it, recommend it and like it :)


Downloads are hosted on the official Firefox Add-ons repository at, where you can always find the latest version:

Download Muttator 1.2

Release Notes | Other Versions | Source Code



Muttator Hints Muttator showing the same type of Hints to follow links with the keyboard as Vimperator

Muttator Completion Muttator’s completion system

Muttator Minimal Most chrome can be hidden in Muttator to give the messages more room


While Muttator offers already lots of cool features, we cannot and don’t want to include every feature directly in the core. Therefore you can enhance the Muttator experience by adding plugins which add new commands or mappings. Install these plugins by copying them to the ~/.muttator/plugin/ directory (or %HOME%\muttator\plugin on Windows) unless noted differently.

If you don’t care about features but just use Muttator for the sexy looks, you can also theme that by using color schemes. You can install them by copying them to the ~/.muttator/colors/ directory (%HOME%\muttator\colors on Windows) and use it with :colorscheme <name>.


Unexpected features - sometimes also called bugs - are listed in our issue tracker. You can also file feature requests there.

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