Parquet to CSV Converter

Convert Parquet datasets to CSV in seconds with DuckDB running locally. Supports Snappy, Gzip, and Zstd without uploads — data stays private.

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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.

Specs

Max file size
~1 GB
Input
.parquet
Output
.csv
Compression
Snappy, Gzip, Zstd
Engine
DuckDB WASM

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 — 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.

Advantages of CSV Format

CSV (Comma-Separated Values) is a simple, widely supported file format for storing tabular data. Here are some key benefits of converting Parquet to CSV:

  • Universal compatibility with spreadsheet software and data analysis tools
  • Human-readable format, making it easy to view and edit
  • Smaller file size compared to some other formats, ideal for sharing
  • Simple structure that's easy to parse and generate programmatically

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