Create a session, share the worker URL with volunteers, then start runs.
This is a DuckDB Wasm project
Larger chunks = fewer round-trips but more work per volunteer tab. Leave blank to use the server default.
Merge complete — result is a Parquet file ready to download.
Download resultInspect the column schema and row count of a remote Parquet file before running a job. The file must serve CORS headers (Access-Control-Allow-Origin: *).
This is an open-source experiment. Bugs should be expected.
How it works: The researcher creates a session here and shares the worker URL with others. Each volunteer opens that URL in their browser, which acts as a worker. The coordinator splits the dataset into chunks and distributes them across all connected workers. Each worker processes its chunk locally using DuckDB-WASM — no data is sent to a central server. Partial results are returned to the coordinator and merged into a final result available for download.