WhatTheDuck – open-source, in-browser SQL on CSV files

WhatTheDuck is an in-browser sql tool to analyze csv files that uses duckdb-wasm under the hood. Please provide feedback/issues/pull requests.

Visit github.com ↗Alternatives

In plain words

WhatTheDuck is an open-source, in-browser tool that lets users run SQL queries directly on CSV files using DuckDB-Wasm. It's designed for developers and data analysts who need to quickly analyze CSV data without installing additional software. The tool runs entirely in the browser, making it accessible and lightweight for exploratory data analysis tasks.

written from the facts on this page · September 2026

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