Parquet to CSV Converter
Why use this Parquet to CSV converter
100% browser-based conversion
Your Parquet file is parsed and converted entirely in your browser using WebAssembly. No data is uploaded to any server, keeping your information private and secure.
Instant preview before download
Inspect rows, columns, and data types in a spreadsheet-like table before exporting. Filter or sort the data to download exactly what you need.
No signup or installation
Open the page, drop your file, and get a CSV in seconds. No account creation, no software download, no command-line tools required.
What is a Parquet file?
Apache Parquet is an open-source, column-oriented data storage format designed for efficient data processing. It is widely used in big data ecosystems such as Apache Spark, Hadoop, and cloud data warehouses like AWS Athena, Google BigQuery, and Snowflake.
While Parquet is excellent for storage and analytics, CSV remains the universal format for data exchange. Converting Parquet to CSV lets you open the data in spreadsheet applications like Excel or Google Sheets, import it into databases, or share it with colleagues who need a simple, readable format.
Columnar storage
Data is stored column by column rather than row by row, enabling faster analytical queries and better compression ratios.
Schema preservation
Parquet files embed column names, data types, and nested structures directly in the file metadata, ensuring data integrity.
Efficient compression
Built-in encoding schemes like Snappy, Gzip, and Zstd can reduce file sizes significantly compared to CSV while maintaining read performance.
How to convert Parquet to CSV
- 1
Upload your Parquet file
Drag and drop a .parquet file into the converter above, or click the upload area to select one from your computer.
- 2
Preview and inspect the data
The converter reads the Parquet schema and displays all rows and columns in an interactive table. Check column names, data types, and values before converting.
- 3
Download as CSV
Click the download button to export the data as a standard .csv file. The CSV uses UTF-8 encoding and comma delimiters for maximum compatibility.
Tips for converting Parquet to CSV
Check for nested columns
Parquet supports nested and complex types (arrays, maps, structs). These are flattened during CSV conversion, so review the output to ensure the structure meets your needs.
Be mindful of file size
Parquet's compression means the resulting CSV can be significantly larger. A 50 MB Parquet file may produce a 500 MB CSV. For very large files, consider filtering columns before download.
Preserve data types
CSV stores everything as text. If you need to retain numeric precision, dates, or boolean types, consider keeping a copy of the original Parquet file alongside the CSV.
Parquet to CSV Converter FAQ
How do I convert a Parquet file to CSV?
Traditionally, converting Parquet to CSV required programming tools like Python (pandas or PyArrow) or Apache Spark. With this online converter, you can simply drag and drop your .parquet file into the browser and download the CSV instantly — no coding or installation needed.
Is my data safe when converting Parquet to CSV online?
Yes. This converter runs entirely in your browser using WebAssembly. Your Parquet file is never uploaded to any server. All parsing, conversion, and CSV generation happen locally on your device.
What is the maximum file size supported?
Since conversion happens in your browser, the limit depends on your device's available memory. Most modern devices can handle Parquet files up to several hundred megabytes without issues.
Why convert Parquet to CSV?
Parquet is optimized for data analytics and storage but cannot be opened in spreadsheet applications. CSV is universally supported by Excel, Google Sheets, databases, and virtually every data tool. Converting to CSV makes your data accessible to a wider audience.
Can I convert CSV back to Parquet?
Yes. We also offer a free CSV to Parquet converter. Converting CSV to Parquet is useful when you want to reduce file size and improve query performance for analytical workloads.
Does the converter handle compressed Parquet files?
Yes. The converter supports Parquet files with common compression codecs including Snappy, Gzip, LZ4, and Zstd. The file is decompressed automatically during conversion.
Want to visualize your CSV data? Try our Want to visualize your CSV data? Try our.