Parquet to CSV converter

Convert your Parquet files to CSV format for Excel, Google Sheets, and any spreadsheet tool. Files are processed locally in your browser.

How the Parquet to CSV conversion works

Drop a .parquet file and it is decoded in your browser via WebAssembly — never uploaded. You preview the parsed rows first; nothing downloads until you click. The CSV uses a comma delimiter, a header row from the Parquet column names, RFC-4180-style quoting (fields with commas, quotes, or newlines are wrapped and inner quotes doubled), and empty cells for nulls.

How Parquet types map to CSV

• BOOLEAN → true / false
• INT32 / INT64 → plain digits; 64-bit values keep exact precision
• FLOAT / DOUBLE → decimal digits as stored
• TIMESTAMP → ISO 8601 UTC (2024-05-01T23:42:05.328Z)
• BYTE_ARRAY / UTF8 → text, quoted only when needed
• NULL → empty cell
• Nested structs and lists are not flattened — export JSON or use the SQL editor for nested data.

Large files and limits

Reads cap at the first 100,000 rows with a visible notice; the exported CSV contains exactly the previewed rows. For multi-gigabyte files use pandas (read_parquet().to_csv()) or DuckDB's COPY … TO.