The AD file extension is related to the AppleDouble and used for its encoded files.

There are 5 other file types using
the AD file extension!

empty - After Dark screen saver file

empty - AxSys script file

empty - UNIX application default resource file

ad - Application Diagram file

empty - Anno Designer project

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AD file - AppleDouble encoded file

What is ad file? How to open ad files?

File type specification:

Encoded and encrypted file type icon Encoded and encrypted file type

ad file icon: ad filetype icon

The AD file extension is related to the AppleDouble and used for its encoded files.

AppleDouble leaves the data fork in its original format, allowing it to be edited by normal Unix utilities. The resource fork and Finder information, both propietary and lacking editors under Unix, were combined into a second file.

The AppleDouble format should be the primary format when sending a Macintosh document. It makes it possible for a user that can't decode the AppleDouble header to read and use the Data fork of the document. It also keep the Macintosh specific information in the AppleDouble header, so a user who can decode the AppleDouble header can get the extra information, such as customised icons, which is not essential to the document itself.

Mime: application/applefile

Help how to open:

This file type is not meant to be opened directly, there is no software that could open and work with it directly, or there is no information available in public sources about opening this file type. This is usually the case of some internal data files, caches, temporary files etc.

How to convert:

As far as we know, this .ad file type can't be converted to any other file format. This is usually the case of system, configuration, temporary, or data files containing data exclusive to only one software and used for its own purposes. Also some proprietary or closed file formats cannot be converted to more common file types in order to protect the intellectual property of the developer, which is for example the case of some DRM-protected multimedia files.

Related links:

AppleDouble full overview

List of recommended software applications associated to the .ad file extension

Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open ad file, edit ad file, convert ad file, view ad file, play ad file etc. (if exist software for corresponding action in's database).

  • Others ad file

Unspecified and all other actions for computer programs working with ad file - AppleDouble encoded file

Click on the software link for more information about Mac OS X. Mac OS X uses ad file type for its internal purposes and/or also by different way than common edit or open file actions (eg. to install/execute/support an application itself, to store application or user data, configure program etc.).

Apple macOS / Mac OS X:

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