http://localhost:3000/docs Practical guides on working with Parquet files — no Spark, no installs, everything in the browser. en http://localhost:3000/docs/merge-multiple-parquet-files http://localhost:3000/docs/merge-multiple-parquet-files Combine several Parquet files into a single dataset with DuckDB SQL in your browser — including files whose schemas don't quite match — or with pyarrow. http://localhost:3000/docs/open-parquet-file-without-spark http://localhost:3000/docs/open-parquet-file-without-spark Five ways to open and inspect a Parquet file — from zero-install browser tools to DuckDB one-liners — and when each one makes sense. http://localhost:3000/docs/open-parquet-in-excel http://localhost:3000/docs/open-parquet-in-excel Excel cannot read Parquet natively. Convert the file to CSV in your browser — and trim oversized files with SQL first — to get it into a spreadsheet. http://localhost:3000/docs/parquet-vs-csv http://localhost:3000/docs/parquet-vs-csv A practical comparison of Parquet and CSV — file size, query speed, type safety and tool support — with concrete guidance on choosing. http://localhost:3000/docs/query-parquet-with-sql-in-browser http://localhost:3000/docs/query-parquet-with-sql-in-browser Run real SQL against local Parquet and CSV files using DuckDB in the browser: joins, aggregates and window functions with zero setup.