data

Parquet Viewer

Inspect Parquet files directly in your browser without uploading them.

Local processing

About your filesFiles and content selected in this tool are processed in your browser and are not uploaded to a Browser Kitty backend.

Operation demo See the basic workflow in a short video.

About this tool

Parquet Viewer is a preview and inspection tool for Apache Parquet files. It shows schema, row counts, row groups, creator metadata, custom key/value metadata, codecs, and paged row previews.

It uses a metadata-first approach and reads the requested preview range instead of eagerly expanding the entire file. This makes it useful for pipeline debugging and quick structural checks.

Good for

Quickly inspect the schema and row count of Parquet generated by a data pipeline
Check compression codecs, row groups, and metadata in a received Parquet file
Preview a limited set of rows and copy or download the current page as CSV without setting up a query environment

What it can do

Key capabilities available in this tool.

View Parquet files
Local file support
No installation
Local browser processing

How to use

Select Open tool and choose or drop one or more .parquet files.
Choose a file tab and inspect its schema, metadata, row count, and row groups.
Select the number of preview rows per page and move to the page you need.
Click a column header if you want to sort the current preview page ascending or descending.
Download the visible page as CSV or copy it to the clipboard.

Supported

Reads Parquet v1 and v2 files.
Compression: Uncompressed, Snappy, Gzip, Brotli, LZ4, LZ4_RAW, and Zstandard.
Preview 50, 100, 250, 500, or 1,000 rows per page.
Open multiple files in tabs and inspect schema, metadata, and row previews.

Limitations and notes

This is a preview and inspection tool, not a SQL query engine.
Sorting is limited to the currently visible preview page.
CSV download and copy actions export only the current preview page.
Some files may use encodings or structures that the embedded parser cannot read.

Frequently asked questions

Are Parquet files uploaded to a server?

No. Selected Parquet files are read in your browser and are not uploaded to Browser Kitty.

Can it open Snappy- or Zstandard-compressed Parquet?

Yes. It supports Snappy, Gzip, Brotli, LZ4, LZ4_RAW, Zstandard, and uncompressed data.

Can it convert an entire Parquet file to CSV?

The current CSV export covers the visible preview page only. It is not intended as a whole-file conversion tool.

Can I open multiple Parquet files?

Yes. Multiple files can be opened in tabs and inspected side by side by switching tabs.

Offline version and source code

Save the single-HTML build from GitHub to open it locally without an installation or server. The required Parquet parser and compression support are embedded.

View source on GitHub