Quicken accounting software should be able to export financial data saved QDF format (Quicken Financial Data) to QIF format (Quicken Interchange format). Used to share and transfer data from one system to another, or between users, but only doable using Quicken.
Convert Quicken financial data to Quicken Interchange format.
We found 2 software records in the database related to .qdf to .qif file format conversion.
Microsoft Windows software - convert qdf to qif on Windows
A personal finance management program by Intuit
Convert from qdf file format
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned qdf to qif. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
Apple macOS / Mac OS X software - convert qdf to qif on OS X
Mac version of popular Quicken personal finance management software