Made for Swiss self-employed & SMEs
A small business often needs to crop a product photo, prepare a staff portrait or tidy an event image without paying for a large creative suite. Compositor is a new, free image editor that offers familiar layers, masks and adjustments. Its appeal is straightforward; so are its limits: it currently requires a recent Apple-silicon Mac, and it is still a young project.
What Compositor actually does
Compositor is an open-source desktop editor for working with images in layers. You can group layers, change their opacity and blend mode, paint or refine masks, and add adjustments such as levels, curves and colour changes. A mask lets you limit an edit to part of a picture; for example, you can brighten a face without brightening the whole scene. Changes to transforms are non-destructive, so resizing a layer does not throw away its original pixels.
The project stores a document as a folder containing PNG layers and a manifest, rather than hiding everything in one opaque file. That may make it easier to inspect or script a project. The review says scripts and AI agents can edit those project files, but Compositor itself is not an AI image generator: it runs on the computer and does not call an AI model. Treat that as a description of the software, not as an independent security audit.
Where a small office might use it
For a freelancer or small firm, the practical jobs are modest: crop a service photo, remove a distracting object, prepare a consistent profile image, or make a few versions of a graphic for a website and newsletter. Layers and masks are useful when you need to keep text, a logo and a photograph separate, then revise one part without rebuilding the whole image.
There is no subscription or separate model bill for the editor itself. That could suit a business that already owns a compatible Mac and only needs occasional image work. It is not automatically cheaper if it costs you time to learn, if you need a new computer, or if your existing tool already does the job. For routine social posts, a simpler editor may be quicker.
Check the limits before relying on it
Compositor currently runs only on Apple-silicon Macs with macOS 26 or later. It will not run on Intel Macs, Windows or Linux. Building it from source requires Xcode 26. A project comparison also notes limits in PSD import: 8-bit RGB is supported, but CMYK workflows are not. If a printer expects a colour-managed CMYK file, keep your established production software.
This is a new project, not a mature replacement with years of support and a broad plugin ecosystem. A feature list cannot tell you how reliably it handles your files. Keep the original photo untouched, check exports at their final size, and do not make it the only copy of a client deliverable. Local editing can reduce the need to upload an image to an online service, but it does not replace access controls, backups or your client’s consent.
A sensible, low-risk trial
Start with a non-sensitive image you own, such as a product photo or a public event picture. Make one small edit, export it, then open the result on the device and platform your clients use. Check sharpness, colours, transparency and file size. If you need print, ask your printer about the required format before changing your workflow.
- Confirm that your Mac meets both the processor and operating-system requirements.
- Save a copy of the source image and project before experimenting.
- Test the exact export you plan to publish or deliver.
- Use a different tool if you need Windows, CMYK print production or dependable support today.
Compositor is worth a careful look if you want a free, locally run layer editor and already have the right Mac. It is not a reason to replace a working process on trust. Try one ordinary task first, and keep the software that meets your delivery and support needs.
