Robbie Tilton Releases Free Open Source Photoshop-style Image Editor Compositor
Designer Robbie Tilton has released an image editor called Compositor, styled after Photoshop, originally built to free himself from Adobe subscriptions, and later decided to make it free and open source.
The application is approximately 12MB in size, compared to the 6455MB of Photoshop on his machine. The tool covers core functions needed for compositing such as layers, masks, blending modes, adjustment layers, spot healing, and clone stamp, while removing redundancies.
Tilton stated that by 2026 this workflow may seem outdated, but will continue to be used until AI can achieve pixel-level precision in certain details. The project is open source under the MIT license, allowing users to modify the source code to fit their own workflows, and has already been ported to Windows and Linux.
GitHub has received over 16,000 stars, with downloads reaching tens of thousands within weeks of release. The application requires macOS 26.5 or higher, is built with Swift, supports importing formats like PSD, and allows AI agents to edit projects directly.
Tilton previously worked in Apple’s Human Interface team and Google[X], contributing to experience design related to Vision Pro and Glass. The latest version continues to add features such as 16-bit layers, HDR, CMYK proofing, and Camera Raw matching.
Capital and users are shifting from Adobe subscriptions to free open source lightweight tools, driven by subscription costs and software size, benefiting independent creators and open source contributors, while traditional large subscription software faces pressure.
Source: Public Information
ABAB AI Insight
Robbie Tilton, drawing from his design experience at Apple and Google[X], has built a lightweight editor focused on compositing workflows to address the issues of Photoshop subscription costs and unfamiliarity with GIMP, and has made it open source to allow modifications.
In terms of capital flow, personal time and code investment replace ongoing subscription fees, with funds shifting from Adobe to zero-cost local tools, motivated by the desire for pixel-level controllable compositing rather than generative uncontrollable methods, reallocating resources from closed-source, large software to open-source, small applications.
Similar cases include early open source design tools attempting to replace professional software, and the current phase where AI generation tools have not fully replaced precise editing. Image editing is currently transitioning from large subscription software to lightweight open source and AI-assisted parallel stages, with traditional processes still existing under pixel precision demands.
This essentially represents a technological substitution: lightweight open source tools replace bulky subscription software, with the mechanism being that reduced size and cost enable individuals to replicate core workflows, while AI retains manual control space when detail precision is insufficient.
ABAB News · Cognitive Laws
Size reduced from GB to MB, subscriptions can be replaced
When precision is not achieved, traditional processes still exist
Open source core tools allow individuals to replicate workflows