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FastViewer

Fast image viewer for macOS that doesn't use your files to train AI

Download Now macOS Monterey 12.0+
Fast image switching with prefetching

Made to be Fast

FastViewer loads images instantly with GPU-accelerated rendering, smart prefetching, and efficient caching. Navigate large galleries smoothly with zero lag.

No AI
No AI, no app analytics
File formats
JPG, PNG, WEBP, AVIF support
File info
Show file size, resolution or date
Resize window
Resize window to fit the image
Zoom
Zoom in, zoom out
Show in Finder
Show image in Finder
Move to Trash
Move current file to Trash
Undo
Undo deleting the file

Navigate

Browse your photo collection with simple arrow key navigation. The app automatically loads surrounding images ahead of time, so every transition feels instant and smooth.

Control

Customize FastViewer to match your workflow: adjust prefetching, choose supported formats, and control what information is displayed.

Privacy First

FastViewer operates with complete privacy: no AI model training, no in-app analytics. All image processing happens locally on your device.

Keyboard Shortcuts

Open file (or double-click empty window) ⌘O
Previous image ←
Next image →
Set small window ⌘1
Set medium window ⌘2
Set big window ⌘3
Fit window to image ⌘4
Reveal file in Finder ⌘Enter
Move to Trash ⌘⌫
Undo delete ⌘Z
Open settings ⌘,