CSV to Parquet

Convert CSV files to Apache Parquet in your browser. Choose a compression codec and download the result locally — files never leave the page.

How it works

Drop a .csv file onto the page; column types are inferred from the data, the rows are written to Apache Parquet, and the .parquet file is downloaded. No upload.

Compression options

Choose SNAPPY (the default — fast, balanced), UNCOMPRESSED, or GZIP (smaller files, slower) before converting.

Private by design

Conversion runs locally in your browser — there is no server and no upload.