Parquet Converter
/parquet-converterConvert Apache Parquet files to CSV, JSONL, or Excel, and convert CSV/Excel/JSONL to Parquet. All conversions run locally with Snappy compression.
Parquet is the columnar format analytics engines love and humans cannot read. This converter bridges Parquet with CSV, JSONL, and Excel in all six directions, using Snappy compression for maximum compatibility. It is the fastest way to move columnar data into spreadsheets or pipelines. Everything runs locally with WebAssembly.
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Your Parquet file is converted entirely in your browser — it never leaves your device.
FAQ
Frequently asked questions
Everything you need to know about parquet converter.
What formats can I convert to and from Parquet?
The Parquet converter works with Parquet, CSV, JSONL/NDJSON, and Excel (.xlsx) in all six directions. It is the practical bridge between columnar storage and spreadsheet-based analysis.
Which compression does the Parquet output use?
Output uses Snappy compression, the most widely compatible codec across query engines and data tools, so the files open cleanly in DuckDB, pandas, and data warehouses.
How are nested values represented?
Nested structures are serialized as JSON text inside CSV or Excel cells to preserve the data, while JSONL output emits one complete object per line with full structure intact.
Can I convert large Parquet files?
Yes. Conversion runs fully in your browser memory, so files with a few million rows convert in seconds. The columnar codec runs locally via WebAssembly with no upload.
Is my data private?
Yes. The Parquet engine executes entirely on your device — the file and its contents never reach a server, making it safe to analyze sensitive datasets locally.
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