MAS File

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

What is a MAS file?

The MAS file extension indicates to your device which app can open the file. However, different programs may use the MAS file type for different types of data.

While we do not yet describe the MAS file format and its common uses, we do know which programs are known to open these files, as we receive dozens of suggestions from users like yourself every day about specific file types and which programs they use to open them.

We are continually working on adding more file type descriptions to the site, so if you have information about MAS files that you think will help others, please use the Update Info link below to submit it to us - we'd love to hear from you!

Various MAS file openers, viewers, etc.

These apps are known to open certain types of MAS files. Remember, different programs may use MAS files for different purposes, so you may need to try out a few of them to be able to open your specific file.

Microsoft OfficeMicrosoft OfficeUser submitted
Microsoft AccessMicrosoft AccessUser submitted
Molecular Evolutionary Genetics AnalysisMolecular Evolutionary Genetics AnalysisUser submitted
IBM Lotus Freelance GraphicsIBM Lotus Freelance GraphicsUser submitted
MassiveMassiveUser submitted
Freelance GraphicsFreelance GraphicsUser submitted
FreelanceFreelanceUser submitted
Lotus FreelanceLotus FreelanceUser submitted
Message EditorMessage EditorUser submitted
MasterV8.10.12MasterV8.10.12User submitted

Try a universal file viewer

Try a universal file viewer like Free File Viewer. It can open over 200 different types of files - and most likely yours too. Download Free File Viewer here.

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