Parquet to CSV Converter

Convert .parquet files to spreadsheet-friendly CSV in seconds with DuckDB running locally. Need to inspect first? Open the Parquet Viewer or Parquet Schema Reader.

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Quick start

  1. 1

    Add your Parquet file

    Drop a Parquet file or browse to load it locally — no uploads required.

  2. 2

    Choose CSV options

    Pick delimiter and output settings to match your spreadsheet or BI tool.

  3. 3

    Convert in your browser

    WASM DuckDB extracts rows with Snappy, Gzip, and Zstd support directly on your device.

  4. 4

    Download the CSV

    Export clean CSV instantly and keep working — data never leaves your machine.

Data stays on your device

All processing runs locally in your browser. Nothing is sent to any server.

Our Parquet to CSV converter uses DuckDB running in WebAssembly to convert your Parquet files directly in the browser. Extract rows from the efficient columnar format into universally compatible CSV for spreadsheets, BI tools, and quick sharing, all without installing software or uploading data. Works with Snappy, Gzip, Zstd, and LZ4 compression codecs.

~1 GB

Max file size

0 bytes

Data transmitted

4 supported

Compression codecs

100% Free

Our Parquet to CSV converter is completely free to use, with no hidden costs or subscriptions.

Privacy-Focused

Your data never leaves your device. All processing happens locally in your browser.

Fast and Efficient

Quickly convert even large Parquet files to CSV with our optimized WebAssembly engine.

No Installation Required

Use the converter directly in your web browser — no software needed.

Is the Parquet to CSV converter private?

Yes. Conversion runs entirely in your browser using WebAssembly, so your Parquet files never touch our servers.

What is the maximum Parquet file size?

You can load files up to about 1 GB depending on available browser memory. Larger files may require trimming row groups first.

Does this converter work offline?

Once the page finishes loading you can go offline and keep converting — every operation happens locally.

How do I use the converter?

Drop a Parquet file, adjust CSV options if needed, click convert, then download the CSV — all in a few seconds.

Should I inspect the Parquet schema before converting?

If the file came from an unfamiliar pipeline, use the Parquet Schema Reader first to confirm field names, data types, and nested columns before exporting to CSV.

Can I convert CSV back to Parquet later?

Yes. Use the CSV to Parquet converter when you need to turn a spreadsheet-friendly CSV back into compressed Parquet for analytics.

When to convert Parquet to CSV

CSV is the practical handoff format when someone needs to open data in a spreadsheet, upload it into a legacy tool, or review rows without a Parquet-aware reader. If you need to inspect the file before export, use the Parquet Metadata Reader for row groups and compression details, or the Parquet Schema Reader for field names and types.

  • Universal compatibility with spreadsheet software and data analysis tools
  • Human-readable format, making it easy to view and edit
  • Straightforward sharing with teams that do not use Parquet readers
  • A simple intermediate format you can convert back with the CSV to Parquet Converter

Related tools

Parquet Viewer

Preview rows and inspect schema, metadata, and row groups.

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Parquet Schema Reader

Check field names, data types, and nested columns before exporting.

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Parquet Metadata Reader

Inspect row groups, column chunks, compression, and statistics.

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CSV to Parquet Converter

Convert CSV datasets to Parquet for efficient storage.

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