Thumbnail Grid Studio

Thumbnail Grid Studio is a native macOS/Windows app built with SwiftUI/WinUI. You can import multiple videos with drag and drop or a file picker and generate contact sheets with configurable layout, spacing, colors, metadata visibility, and font sizes.

The app includes bundled ffmpeg and ffprobe, with broad support for formats such as MP4, MOV, AVI, MKV, and WEBM. Final output can be exported as JPG or PNG.