Paint.NET graphics (.pdn) can only be produced with a handful of other programs except for the default one, so your best (and also easiest) way for jpg to pdn conversion would be to download Paint.NET (it's free) and perform he conversion with it.
Convert JPEG bitmap image format to Paint.NET picture format.
We found 4 software records in the database related to .jpg to .pdn file format conversion.
Microsoft Windows software - convert jpg to pdn on Windows
A free photo and image editor
Convert from jpg file format
|Yes, Paint.NET supports jpg file conversion as a source file type.||Yes||Yes||jpg editor||Yes||No||No||No|
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 jpg to pdn. 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.
A free graphics and photo editor and authoring tool
Apple macOS / Mac OS X software - convert jpg to pdn on OS X
Mac version of the popular graphics editor
Linux/Unix software - convert jpg to pdn on Linux
GNU Image Manipulation Program