DuckDB-Wasm: Efficient analytical SQL in the browser
DuckDB-Wasm is an in-process analytical SQL database for the browser. It is powered by WebAssembly, speaks Arrow fluently, reads Parquet, CSV, and JSON files backed by Filesystem APIs or HTTP requests, and has been tested with Chrome, Firefox, Safari, and Node.js. You can try it at shell.duckdb.org or on Observable.