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OWOX Model Canvas - Draw a data model, export Google's OKF — free & open source

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A free, anonymous canvas to design data models — draw marts and joinable relationshipThe visual editor for Google's Open Knowledge Format (OKF) — Google shipped only a viewer; this is the authoring canvas. Draw tables and joins (or let AI draft them), then export a portable, git-friendly data model your LLM can actually read, so text-to-SQL stops guessing your schema. Opens Google's official GA4, Stack Overflow, and Bitcoin samples. Free, open-source, no sign-in is required

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Hey Product Hunt 👋 A few weeks ago Google released the Open Knowledge Format (OKF) – a vendor-neutral, markdown way to describe data models for humans and AI agents. Google shipped a read-only viewer; we built the editor. OWOX Model Canvas lets you draw a data model (or let Claude/Gemini generate it from a sentence), see it as a clean ERD, and export valid OKF — it even opens Google's official sample datasets. It's free, works fully anonymously (no sign-up to try), and it's open source + one-click deployable. We're a long-time Google Cloud Partner and built this because hand-writing OKF is tedious. Would love your feedback — what would make it your default OKF tool? 🙏 🔗 Try it (no sign-up): ⭐ Repo:

Setup was surprisingly quick, and handing off a live report directly into ChatGPT actually worked without my usual data refresh headaches.

One thing that would make this a daily driver for us is a version history tab for each mart, so when a business user asks "why does this number look different than last week" we can see exactly when a schema or definition changed without digging through Slack.

Finally tried OWOX Data Marts this week and the handoff to ChatGPT for ad-hoc questions worked way smoother than I expected. Love that business users get live data without pinging me for a refresh.

Finally tried OWOX Data Marts and was impressed by how the handoff to spreadsheets just works—no broken formulas when data updates. The AI tool integration is a nice touch for our team.