Are my JSON files uploaded anywhere?

No. This conversion runs entirely inside your browser, so the file never leaves your device. You can confirm it yourself: open the network tab of your browser's developer tools and watch that nothing is sent while the file converts.

Is converting JSON to Parquet free?

Yes, without a limit on how many files you convert and with no watermark on the result. Files up to 100 MB are covered by the free plan.

Does converting JSON to Parquet lose quality?

JSON and Parquet describe content in fundamentally different ways, so the conversion is a reconstruction rather than a copy. The result is faithful, but not byte-for-byte equivalent.

Do I need to install anything to open Parquet files?

No installation is needed for the conversion itself — it runs in the browser you already have. Opening the Parquet afterwards needs whatever software normally handles Apache Parquet on your device.

JSONtoParquet

Convert JSON to Parquet

Up to 3 files at once, 100 with Pro. Mixed formats are fine.

JSON to Parquet conversion is not running yet. This page describes what it will do; the JSON conversions that work today are linked at the bottom.

What JSON and Parquet are for

The data format of the web. Nested structures, read by every programming language.

Columnar storage for large datasets. Far smaller and faster to query than CSV.

How to convert JSON to Parquet

Drop your JSON file onto this page, or click to pick one.
Choose Parquet as the target. The conversion runs inside your browser — the file is never uploaded.
Download the finished Parquet file.

JSON vs Parquet: what changes

JSON compared with Parquet
	JSON	Parquet
Full name	JavaScript Object Notation	Apache Parquet
File extension	.json	.parquet
Media type	application/json	application/vnd.apache.parquet
Compression	—	Lossless — nothing is discarded

Quality: The result is a close reconstruction rather than an exact copy. Check it before relying on it.
Where it runs: This conversion is not available yet. The page describes what it will do once the engine ships.

JSON to Parquet: common questions

Are my JSON files uploaded anywhere?: No. This conversion runs entirely inside your browser, so the file never leaves your device. You can confirm it yourself: open the network tab of your browser's developer tools and watch that nothing is sent while the file converts.
Is converting JSON to Parquet free?: Yes, without a limit on how many files you convert and with no watermark on the result. Files up to 100 MB are covered by the free plan.
Does converting JSON to Parquet lose quality?: JSON and Parquet describe content in fundamentally different ways, so the conversion is a reconstruction rather than a copy. The result is faithful, but not byte-for-byte equivalent.
Do I need to install anything to open Parquet files?: No installation is needed for the conversion itself — it runs in the browser you already have. Opening the Parquet afterwards needs whatever software normally handles Apache Parquet on your device.