A super fast and simple retina (@2x, @3x) image converter.
You can download the prebuilt application from this link, or just download / fork the project and built it yourself.
After you've got the app running, you can drag single files, multiple files and directories to convert @3x or @2x images. Dragging is allowed in the Retini window aswell as the App Icon in the Dock.
The resized images will be placed in the same directory as the source file. The resizing goes like this:
| Generated? | Drag @3x file | Drag @2x file |
|---|---|---|
| @2x | √ | × |
| 1x | √ | √ |
The original file will never be altered, the @2x and 1x are copies. If you drag a @3x file, the 1x file generated will be generated from the (original) @3x.