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

What is an ADDIN file?

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

While we do not yet describe the ADDIN 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 ADDIN 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 ADDIN file openers, viewers, etc.

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

Any Video Converter ProfessionalAny Video Converter ProfessionalUser submitted
Stuffit ExpanderStuffit ExpanderUser submitted
progeCAD Professional EnglishprogeCAD Professional EnglishUser submitted
progeCAD ProfessionalprogeCAD ProfessionalUser submitted
Microsoft Visual Studio CTPMicrosoft Visual Studio CTPUser submitted
Embarcadero RadPHP XE2Embarcadero RadPHP XE2User submitted
MasterClips MediaPaq BrowserMasterClips MediaPaq BrowserUser submitted
Microsoft Visual C# ExpressMicrosoft Visual C# ExpressUser submitted
SingularLogic Report ViewerSingularLogic Report ViewerUser 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!