What is the SD4 file format?
A file with the .SD4 extension is a file known as Smart Diary Suite Database. It belongs to the Database Files category. This format is associated with Programming Sunrise.
The reliable way to open a .SD4 file is with software that recognises this exact format, rather than guessing from the file name. If you are not sure what created a file, our file identifier can read its first bytes and name the real format, even when the file has been renamed.
We are still gathering the list of programs that open .SD4 files. A fully verified, hand-written description of this format is being prepared; until then, the details on this page are drawn directly from our database.
Format details
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