How to open DDT files

Did your computer fail to open a DDT file? We explain what DDT files are and recommend software that we know can open or convert your files.

What is a DDT file?

DDT files are Diagram Designer Template files, which you can read more about below.

The DDT file extension indicates to your device which app can open the file. However, different apps may use the same file extension for different types of data. So a DDT opener may not be able to open all kinds of DDT files. In this case, though, we only know of one specific use.

Diagram Designer Template

Through our analysis of DDT files, we know that one use of the format is Diagram Designer Template. 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.

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

DDT file openers, viewers, etc.

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

Diagram DesignerDiagram DesignerUser submitted
WinSQLWinSQLUser submitted
C MAXC MAXUser submitted
We have not verified any programs that we know for certain can work with DDT-files on Mac. If you know one, please use the Suggest link below and tell us about it!
We have not verified any online services that we know for certain can work with DDT-files. If you know one, please use the Suggest link below and tell us about it!