AIM (AOL Instant Messenger) UI plug-in
File type: Plugin, addon file
An .amo file is a user-interface plug-in for AIM (AOL Instant Messenger) on Microsoft Windows.
It is an add-on component for AIM, not a document intended for independent viewing.
File type category:
Plugin, addon file
Date updated: October 12, 2026
The .amo file extension is associated with AIM (AOL Instant Messenger), the instant-messaging program developed by AOL. These files provide plug-in functionality related to AIM's user interface.
AIM used plug-ins to extend the host application with specific functionality. An .amo file therefore belongs with the AIM installation and is loaded by compatible AIM software rather than opened as a stand-alone file.
The format was used by the Microsoft Windows version of AIM. AOL discontinued AIM, so the format is obsolete and is not generally supported by current software.
Use the Microsoft Windows version of AIM (AOL Instant Messenger) that the file was designed for, if a compatible installation is available. The file is intended to be used as an AIM plug-in with that installation.
An .amo file normally cannot be opened meaningfully by double-clicking it or with a general-purpose application. Because AIM has been discontinued, there is no current officially supported program for opening these files.
There is no standard conversion for an .amo file. It is an AIM plug-in component rather than a document or media file, so converting it to another format would not preserve a useful equivalent.
Software applications that handle other tasks involving amo files:
Microsoft Windows
AOL Instant Messenger (AIM)
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