CSV to Parquet

Paste or upload CSV and download a Parquet file. Client‑only with WebAssembly.

CSV to Parquet

Tips

  • For very large files, convert in chunks or sample to verify schema first.
  • Use numeric types where possible to reduce file size.

FAQ

Does this convert CSV to Parquet in-browser?
Yes, via DuckDB‑WASM; no data leaves your device.
How big a file can I convert?
Depends on available memory; try subsets if the browser becomes constrained.