Parquet to CSV
Convert Parquet files to CSV on your Mac without uploading them to a cloud converter. DataEngUtils streams large files through Polars locally — select columns, handle nested types with clear errors, and save wherever you want. Built for data engineers who cannot send production datasets to a browser tab. The desktop app reads row groups incrementally, so multi-gigabyte exports stay responsive while you keep full control of output paths, delimiters, and column selection. When a schema is messy or a nested field needs flattening, you get actionable errors instead of a silent failure in someone else's SaaS UI.
Try it free
Available in the desktop app
Parquet to CSV processes local files with Polars in Rust. Multi-gigabyte Parquet and CSV workflows require the native macOS app — nothing is uploaded to the cloud.
SELECT
order_id,
customer_id,
created_at
FROM analytics.fct_orders
WHERE created_at >='2026-01-01'
How it works
1. Drop your Parquet file
Open Parquet → CSV in DataEngUtils and drag a .parquet file from Finder. The file never leaves your Mac.
2. Choose columns and options
Preview schema, pick columns to export, and configure CSV settings before writing output.
3. Export locally
Save the CSV anywhere on disk. Repeat on the next file without re-uploading to a website.
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 locally — same convenience, none of the exposure.