Duck-UI – Browser-Based SQL IDE for DuckDB

In plain words

Duck-UI is a browser-based SQL editor that runs DuckDB directly in your browser using WebAssembly, requiring no backend server. Users can load CSV, JSON, Parquet, and Arrow files from their computer or URLs, then write and execute SQL queries instantly with results displayed in the editor. The tool includes autocomplete, syntax highlighting, query history, and keyboard shortcuts. Data remains on the user's machine and persists across browser sessions. It's designed for developers and analysts who need quick SQL analysis without the friction of setting up notebooks or uploading files to hosted services.

written from the facts on this page · September 2026

From the sources

In the maker’s words, at launch

I built Duck-UI, a web-based SQL editor that runs DuckDB entirely in your browser via WebAssembly. No backend required. The Problem: Every time I needed to query csv, parquet, or even to play with SQL, I had to either: (a) spin up a Jupyter notebook (b) use the CLI (c) upload to a hosted service. Friction at every…

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