
SlimSnap
Your AI doesn't know which button you mean

The AI reads your screenshot as a pixel blob and guesses which button you meant. SlimSnap converts the screenshot plus your annotation into structured JSON: every element has coordinates, an ID, and your arrow points at a specific one. Around 700 tokens vs 1,568 raw on Sonnet. Free Mac app. Schema and Claude Code skill are open MIT. Runs entirely on-device.
AI Analysis
SlimSnap is a free Mac app that solves the pain point of AI models misinterpreting referenced UI elements in screenshots, which are treated as undifferentiated pixel blobs. Users annotate screenshots (e.g. with arrows), and the tool outputs structured JSON with element coordinates, IDs, and precise targeting. This cuts token usage (~700 vs 1,568 raw on Sonnet), runs fully on-device for speed and privacy, and offers an open MIT-licensed schema plus Claude Code skill. Core value is enabling accurate, efficient AI-assisted design, coding, and automation workflows.
In 2025-2026, multimodal AI and agentic systems are maturing rapidly, with rising demand for precise visual-to-structured data conversion amid high API costs and privacy concerns. On-device vision tech is becoming reliable, and user needs for better UI prompting in design/productivity tools are surging. Excellent Timing due to alignment with AI agent growth and token-efficiency priorities.
High. Technical difficulty is manageable using on-device computer vision models; the app is already built and launched. Low development/operation costs as a free, local Mac app with no cloud dependency. Minimal supply chain or compliance risks due to on-device focus. Strong scalability potential to other platforms and open-source components aid team/extension fit.
Main segments: Mac-based software developers, UI/UX designers, and AI tool power users in the tech industry, concentrated in North America, Europe, and East Asia. The broader AI productivity and design tools market has substantial and growing demand. Core pain points are inaccurate AI understanding of visual references leading to workflow errors. Potential willingness to pay is high for pro features despite current free model.
Medium. Direct competitors: 1. screenshot-to-code (github.com/abi/screenshot-to-code), 2. v0.dev by Vercel, 3. Uizard (uizard.io), 4. Visily (visily.ai). Advantages vs competitors: on-device processing, token efficiency, precise arrow annotation for element ID, open MIT license. Disadvantages: currently Mac-only, lacks broad code-generation capabilities of some rivals, potentially lower detection accuracy than cloud solutions.
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