File Extension ADO

  • Full name
    Adobe Photoshop Duotone Format
  • Developer
    Adobe Systems
  • Popularity
Have you encountered a problem with a ADO file? Don’t you know which program opens a file with this extension? You will find all the information you need about working with a ADO file here. In the further part of this page we have added a list of programs that should open your ADO file. It is enough you choose a proper application for your operating system, download and install it.


With the file extension ADO so-called Adobe Duotone Options files of the image editing software Photoshop are marked. An ADO file saves values of two colors for a duotone setting to the application on a grayscale image. In the German version of the mode is called duplex.

The duplex dialog box can be reached under 'Picture-> Mode-> Duplex'. In this box values can be saved and loaded. Usually ADO files are stored under Preferences / Duplex. This makes it easy to reuse useful settings and also use them for batch processing.

Programs which can open a ADO file

How to open a ADO file? Advice and guidance

Absolutely most often appearing reason that prevents you from opening the ADO file is the lack of a proper application to support it in your operating system. It is notably the first thing you need to address. When one of the programs to support a ADO file from the list is already installed, you can try to rerun the file. The system should display a message asking you to choose a primary application to support ADO files. At this point we are looking for disk space where the application was installed in and we can link it with a ADO file. Since then, our operating system will use the selected program to support all ADO files.

Other issues

Despite the described problem with ADO there may be many more problems. If the existing operations were not effective, get involved with the following matters:

- verify that the ADO file is not damaged and that it has been downloaded or copied in whole
- verify that the file has a file extension that has not been intentionally changed (for example, if it do not contain other information than its extension suggests)
- make sure again whether the ADO file type is linked in the operating system with a proper program
- make sure that the file is not infected with a virus and you have up to date software and drivers.

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