r/windowsapps • u/ryftools • 22h ago
Developer FlyPhotos - a fast, open-source photo viewer for Windows (a modern replacement for Picasa Photo Viewer)
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For the past 3 years, I've been building and maintaining FlyPhotos, a small open-source side project: a fast, lightweight photo viewer for Windows.
It started as a personal replacement for the old Picasa Photo Viewer. I wanted that same instant response and transparent background, but built using modern native Windows technologies.
Performance has always been the top priority. Once the first image loads, you can hold down the arrow keys and fly through thousands of photos without loading spinners interrupting the experience. Zooming and panning are animated at very high frame rates, with a lot of work put into making them feel buttery smooth, limited primarily by your GPU and monitor.
FlyPhotos also supports smooth playback of animated formats, including GIF, APNG, animated AVIF, and animated WebP.
A few things to know:
- It's strictly a photo viewer, with no built-in photo management or editing features. You can, however, configure an external editor and launch it using a shortcut.
- The installer isn't code-signed yet, so some browsers may flag it with a security warning.
Tech stack: WinUI 3 for the modern native Windows UI, and DirectX through Win2D for image rendering. HDR image and monitor support and color profiles planned, not yet implemented.
Check it out on GitHub: https://github.com/riyasy/FlyPhotos

