Free, privacy-first JSON to Parquet converter. Compress JSON data into columnar Parquet format directly in your browser. No uploads, no servers, no sign-up.
Parquet stores data by column, not by row. This means better compression ratios and faster analytical queries. A 100 MB JSON file can shrink to under 20 MB.
Your JSON file stays on your device. No data is sent to any server. Everything runs locally in your browser using DuckDB WASM.
Drop a standard JSON array or a newline-delimited JSONL file. Both formats are auto-detected and converted to Parquet columns.
Filter rows, select specific columns, aggregate data, or add calculated fields. Export only what you need into the Parquet file.
No sign-up, no trial, no watermarks. Convert as many JSON files to Parquet as you need, completely free.
Once loaded, ExploreMyData works without an internet connection. Convert JSON to Parquet even on a plane.
Drag a .json or .jsonl file onto the page. It loads instantly.
Filter rows, select columns, or aggregate before export.
Click Export, choose Parquet, and download the compressed file.
Open exploremydata.com/app, drag your JSON or JSONL file onto the page, then click Export and choose Parquet. Your data is compressed into columnar Parquet format instantly in your browser.
Parquet files are significantly smaller than JSON because of columnar compression. They also load faster in tools like DuckDB, Pandas, Spark, and BigQuery. A 100 MB JSON file often compresses to under 20 MB as Parquet.
Yes. ExploreMyData is powered by DuckDB WASM, the same engine used in data engineering. It processes large JSON files efficiently in your browser without sending data to a server.
Yes. You can filter rows, select specific columns, aggregate data, and apply 32+ transformations before exporting to Parquet. Only the data you need ends up in the output file.
No sign-up, no upload, no tracking. Just drop your file and export.
Convert JSON to Parquet Free