Parquet → CSV
Convert Parquet to CSV in your browser without uploading the file to a cloud converter. DataEngUtils reads the Parquet bytes locally with an Apache Arrow engine compiled to WebAssembly, then streams the output back to you — select columns, set the delimiter, and download the CSV. Nothing is sent to a server, so you can export customer data, finance extracts, and production drops that would never pass a security review if uploaded elsewhere. The engine handles Snappy, Zstd, Gzip, Brotli and LZ4 compression, and the page stays responsive because parsing happens inside a Web Worker.
Open it in the app
Parquet → CSV runs in the DataEngUtils browser app on a Rust engine (Apache Arrow) compiled to WebAssembly — part of the Pro workbench, entirely client-side, and nothing is uploaded.
How it works
1. Open Parquet → CSV
Open the tool in the DataEngUtils app, or click through from this page. No install and no account required.
2. Drop your Parquet file
Drag a .parquet file onto the drop zone. It is read locally in your browser and never uploaded.
3. Pick columns and export
Choose the columns and delimiter, then download the CSV — or copy the preview straight to your clipboard.
Why not use an online tool?
Online converters tools require uploading your Parquet and CSV files to a third-party server. For production work, that is a security and compliance risk. DataEngUtils runs a client-side engine in your browser — same convenience, none of the exposure.