Parquet Explorer & SQL Engine — Any File Size
Drop any .parquet file — even multi-gigabyte datasets — to instantly inspect schemas and run DuckDB SQL queries. All processing stays securely on your device.
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Frequently Asked Questions
No. All file parsing and SQL querying runs exclusively in your browser via WebAssembly. Your data and schemas never touch our servers.
Yes. There is no artificial size limit. The tool uses DuckDB's chunking and local File Access APIs to stream queries directly from your disk, bypassing browser memory caps entirely.
It embeds the DuckDB SQL engine locally, which provides an advanced analytical dialect highly compatible with PostgreSQL, supporting fast aggregations and complex window functions.
Once your query executes, you can export the tabular results directly into CSV or JSON chunks. The engine will display a real-time progress bar while the file safely downloads to your computer.
Yes. Once the web page and its standalone WebAssembly workers are loaded, you can safely disconnect from the internet and query locally stored Parquet files indefinitely.