Riffle is an app we wrote for our own use because we couldn’t find anything like it. It’s a super-fast image viewer that can dig deep into a folder hierarchy, showing you every image found in all of its subfolders. It can dig into packages and bundles, so you can use it to find resources within other apps and frameworks. You can choose to only preview images or to use QuickLook to preview files of any type. Plus, it has a myriad of options for customizing the viewer and its behaviors.

Riffle helps you reveal the original files in the Finder, either by using the window title bar drop-down menu or a file path bar within the window. You can double-click on an image to open the original in its native viewer or editor, or you can drag the image from the viewer to copy the original file to your drag destination.

Riffle leverages the speed of SSDs by loading and viewing images without generating previews and caching them to disk. In the event that you have some large images or complex PDFs that take time to render, you can set an option in Riffle to cache image previews in memory to make browsing faster.

Also, Riffle can generate PDF catalogs of your images (like a contact sheet). You can set the number of images per page and the resolution of the images so that you can keep the catalog files nice and small, perfect for sharing or future reference. And it’s only $5, so go download it and give it a try.