APMASTER File - opening and understanding

Did your computer fail to open an APMASTER file? We explain what they are used for and recommend software that we know can open or otherwise handle your .APMASTER files.

What is an APMASTER file?

An .APMASTER file is an Aperture Master file. Through our analysis of APMASTER files, we know that one use of the format is Aperture Master. We have not yet described in detail what these files contain and what they are used for, but our team is working tiredlessly through thousands of file formats. We'd love hearing from you if you have information about the format.

How to open APMASTER files

You will need a program compatible with the specific file you are trying to open, as different programs may use files with file extension APMASTER for different purposes.

We have not yet verified any programs for Windows that work with this specific file format. If you know one, please use the 'Suggest a program' link below. Thanks!

Suggest another file format using extension APMASTER

While we know of one file format using the .APMASTER file extension, there may be more. It is widespread that different programs use files with the same file extension for very different types of data. Please let us know if you are aware of a different kind of .APMASTER file.