How to open D4 files
Did your computer fail to open a D4 file? We explain what D4 files are and recommend software that we know can open or convert your D4 files.
What is a D4 file?
The D4 file extension indicates to your device which app can open the file. However, different programs may use the D4 file type for different types of data.
While we do not yet describe the D4 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 D4 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!
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Various D4 openers
These apps are known to open certain types of D4 files. Since many different programs may use D4 files for different purposes, you may need to try a few of the apps to open your specific D4 file.
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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.