~/sajjad $ cat projects/dropshift
← cd ../projects
Systems
DropShift — Mac file converter
Done · Oct 2026macOS product
A native Mac app for converting files by dragging them: drop photos or PDFs, pick a format from a radial menu, and the converted copies appear next to the originals. Built to sell through my own company. Uses only Apple’s own frameworks, so no file ever leaves the machine.
The product
Converting a photo from an iPhone into something a council form or a supplier portal will accept usually means a website that uploads it somewhere. DropShift does it where the file already is: drag, choose a format from a radial menu around the cursor, done.
The privacy promise is architectural, not a policy: there is no network code and no third-party library in the converter, so a file has no route off the Mac to take.
Rules the converter follows
- Originals are never touched or overwritten.
- Output is written to a private temporary file first and only moved into place when complete, so a half-written file can never appear beside the original.
- If the name is taken, a number is added rather than replacing anything.
- JPG and BMP can’t hold transparency, so transparent areas are put on white — the default would be black.
- Images going into a PDF are fitted to roughly A4 at full resolution; PDFs coming out become one image per page, or their text.
- Phone photos are loaded with their camera rotation applied, so nothing comes out sideways.