About Compositor
Compositor is a free, open-source image editor for macOS, built by its developer as an alternative to Photoshop for compositing and post-processing. It is distributed as a Mac app and as an MIT-licensed Xcode project, so you can add, remove or change features yourself. It needs macOS 26 on Apple silicon. It has layers and folders with blend modes, layer masks, clipping masks and adjustment layers such as Levels, Curves, Hue/Saturation and Gradient Map. Transforms are non-destructive, and selection tools include marquee, lasso, magic wand and Content-Aware Fill. Retouching covers a brush, Spot Healing, Clone Stamp and blur, alongside type, shape and gradient tools, Gaussian and Motion Blur, lens correction, background removal and Photoshop-style shortcuts. Compositor is not affiliated with Adobe.
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Compositor in brief
Is Compositor open source?
Yes. As of November 14, 2026, GitHub reports the MIT licence, an open source licence, for the code at github.com/robbietilton/Compositor.
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