Show HN: Duck-UI Embed – SQL-Powered React Dashboard Components with DuckDB-WASM

Hi HN,

I built @duck_ui/embed — a set of React components that turn SQL queries into interactive dashboards, powered by DuckDB-WASM running entirely in the browser.

     `npm install @duck_ui/embed @duckdb/duckdb-wasm`

 The idea: pass your data (arrays, CSV, Parquet, JSON, or a fetch callback), write SQL, and get charts, tables, KPIs, and filters — no backend required.

     <DuckUIProvider data={{ sales: { url: "/sales.parquet", format: "parquet" } }}>
       <Dashboard columns={3}>
         <Dashboard.Panel>
           <KPICard sql="SELECT sum(revenue) as value FROM sales" label="Revenue" format="currency" />
         </Dashboard.Panel>
         <Dashboard.Panel span={2}>
           <Chart sql="SELECT month, sum(revenue) FROM sales GROUP BY 1" type="bar" />
         </Dashboard.Panel>
         <Dashboard.Panel span={3}>
           <DataTable sql="SELECT * FROM sales" pageSize={20} sortable />
         </Dashboard.Panel>
       </Dashboard>
     </DuckUIProvider>

What's under the hood:

- DuckDB-WASM boots in the browser, data loads into in-memory tables - SQL queries run against real DuckDB (full SQL support, window functions, CTEs) - Parquet files use HTTP range requests — only fetches needed row groups - FilterBar auto-detects column types and injects WHERE clauses via subquery wrapping - Connection pool (max 4), LRU query cache (100 entries, 5min TTL) - ~95KB bundled (ESM), tree-shakeable

Components: Chart (line/bar/area/scatter/pie), DataTable (paginated, sortable, resizable columns), KPICard (with sparkline + comparison), FilterBar (auto or manual config), Dashboard (responsive grid layout), ExportButton (CSV/JSON).

For connecting to external databases (Postgres, MySQL, etc.), there's a "gateway pattern" — your backend runs the SQL and returns JSON, the embed renders it via a fetch callback.

Built with: React 18+, DuckDB-WASM, uPlot, @tanstack/react-table, Zustand. Apache-2.0 licensed.

Live playground: https://duckui.com/play Docs: https://duckui.com/embed/docs npm: https://www.npmjs.com/package/@duck_ui/embed

This is part of the Duck-UI project (https://github.com/ibero-data/duck-ui), a browser-based SQL IDE for DuckDB with 525+ stars. The embed SDK lets you take the same DuckDB-powered analytics and drop them into any React app.

Would love feedback on the API design and what components/features you'd want next.