sindresorhus/gifski

Gifski is a macOS app that converts video files into animated GIFs. You drag in a video, adjust settings, and the app produces a GIF file you can share or embed anywhere. It is available on the Mac App Store and requires a recent version of macOS. The app produces high-quality GIFs by using a technique that creates a custom color palette for each frame rather than sharing one palette across the whole animation. This allows GIFs with thousands of colors per frame, which is far more than the 256-color limitation people typically associate with the format. Frame rates up to 50 FPS are supported, though the app caps at 50 because browsers automatically slow down anything higher. A quality slider lets you trade file size for visual fidelity when you need a smaller file. Gifski supports the video formats that macOS itself understands, including MP4 and MOV files using common codecs. It does not support WebM. The app includes settings for changing the output dimensions, speed, frame rate, cropping, and whether the GIF should loop. There is also a bounce option that creates a back-and-forth playback effect by duplicating the frames in reverse order. The app integrates with macOS in a few useful ways. A share extension lets you send a video directly to Gifski from any app that has a Share menu. A system service lets you convert a video from the Services menu in Finder or other apps. A Quick Action shortcut for Finder is also available so you can convert without opening the app at all. After conversion, you can copy or save the result with a keyboard shortcut. The source code is open under the MIT license. Building from source requires Xcode and the Rust programming language installed on your machine.