Inkwell Data / File converter / JSON to Parquet
Convert JSON to Parquet
Turn JSON or JSON Lines into a compact, typed Parquet file for warehouses and data lakes.
How it works
Each record becomes a row and nested objects become dotted columns. Column types are detected for you: whole numbers become INT32 or INT64, decimals DOUBLE, true/false BOOLEAN, and everything else STRING.
Drop your JSON file above, check the preview, and click Convert & download.
Other conversions
Questions
Does it read JSON Lines?
Yes. Files with one JSON object per line (.jsonl or .ndjson) work as well as a single JSON array.
Which tools can read the Parquet file?
Anything that reads standard Parquet, including DuckDB, Snowflake, BigQuery, Databricks, Spark, pandas, Polars and Power BI.
Are my files uploaded anywhere?
No. The conversion happens in your own browser. There is no server receiving your data, no account and no daily limit.