Parquet File Format

Apache Parquet category

Parquet is the columnar storage format of the big-data world: Spark, Pandas, DuckDB, BigQuery and data lakes all speak it natively. Columns are compressed and typed, so files stay small and analytical queries stay fast.

Typical use: Convert Parquet to CSV or JSON to peek at a data-lake export in a spreadsheet, or turn a cleaned-up XLSX back into Parquet for the pipeline.

About the Parquet format

Parquet is the columnar file format that the data-engineering world standardized on: instead of storing one row after another, values are grouped by column, compressed as a block, and annotated with exact types. That layout is why a Parquet export is often 5–10× smaller than the same table as CSV, and why Spark, Pandas, DuckDB, BigQuery, Snowflake and every modern data lake read it natively.

The catch is that Parquet is binary and column-oriented — you cannot open it in a text editor or most spreadsheet apps. A converter is the bridge: flatten a Parquet file into CSV or JSON to inspect it, hand XLSX/TSV/CSV to it when a cleaned-up table needs to travel back into the pipeline. Types survive both directions, so numbers stay numbers.

Strengths

✓ 5–10× smaller than CSV via per-column compression
✓ Exact column types — no silent string coercion
✓ The lingua franca of Spark / Pandas / DuckDB / data lakes

Limitations

✗ Binary — unreadable without a dedicated tool
✗ Overkill for small hand-edited tables
✗ Nested schemas can confuse simple converters

Structure: Row groups × columns
Types / schema: Typed, per-column compressed
Compatibility: Spark, Pandas, DuckDB, BigQuery
Best for: Analytics, data pipelines, lakes

Convert Parquet to…

10 direct directions, sorted A–Z; 🔥 marks popular targets.

Parquet to CSV Hot Parquet to HTM Hot Parquet to HTML Hot Parquet to JSON Hot Parquet to MHT Parquet to TSV Parquet to XHTML Parquet to XLSM Parquet to XLSX Hot Parquet to XLTX

Convert other files to Parquet…

CSV to Parquet Hot JSON to Parquet Hot TSV to Parquet XLSM to Parquet XLSX to Parquet Hot XLTX to Parquet

Frequently asked questions

What is a Parquet file?

How do I convert Parquet files online?

Pick a target format from the "Convert Parquet to…" list below, drop your file and hit convert. Everything runs in your browser — no install, no upload, no watermark, no limits.

Is it safe to convert Parquet files here?

Yes. Every conversion is performed by your own device inside the browser — files never leave for a server, and the page keeps working even offline.

Which formats can Parquet convert to?

This page lists all 10 directions across documents, images, audio, video, spreadsheets and archives — each one is its own free converter page.