Local-first Parquet explorer

See inside your Parquet files.

A fast viewer for schema, statistics and rows — column-aware and type-coded. It reads in place and never uploads a byte.

Built for people who read schemas

Everything about a Parquet file, at a glance.

Columnar storage deserves a columnar viewer. Type is always legible by color, numbers are always tabular, and the metadata is never more than a glance away.

Open files, folders & URLs

Open a single file, select several at once, point at a whole folder, or paste an https:// URL to a remote Parquet file — it streams only the bytes it needs to read.

multiple files folders https:// URL drag & drop

Schema & logical types

Walk the full schema — physical and logical types, nesting, repetition. Every column is tagged with its type and a fixed color, so the shape of the data reads instantly.

INT64 DOUBLE UTF8 TIMESTAMP STRUCT

Column statistics

Min, max, distinct count, null ratio and compressed size for every column — read straight from the file’s metadata and row-group statistics. No full scan required.

min / max distinct 12% null compressed size

Query with SQL

Run custom SQL against any open dataset — joins, aggregates, CTEs and window functions. Results land in the same type-coded grid and export like any other slice.

SELECT GROUP BY JOIN CTEs

Filter & sort at scale

Add predicate filters and multi-column sorts with type-aware operators. Row-group statistics skip chunks that can’t match, so it stays fast across files with millions of rows.

salary > 100,000 millions of rows

Export slices

Take the filtered, sorted view and export just that slice — to CSV, JSON or a fresh Parquet file with the columns you kept. Everything is written locally.

CSV JSON Parquet selected columns
Three steps

From file to slice in about a minute.

01

Open anything

Drag a .parquet file in, browse to several at once, open a whole folder, or paste a remote URL. Read in place — nothing is uploaded.

02

Inspect & filter

Read the schema and statistics, then filter and sort the rows you care about with type-aware operators.

03

Export a slice

Export the current view to CSV, JSON or a new Parquet file — written straight to a folder you choose.

Two ways to open a file.

Same private, columnar viewer — run it in your browser, or install the native macOS app.

Web viewer

Web app · nothing to install

Open the viewer in any modern browser. Files are still read locally — they never leave your machine.

Open web viewer Chrome · Safari · Firefox · Edge

macOS app

Native · works fully offline

A native desktop build with folder access, drag & drop and faster reads on very large files.

Download on the App Store Apple silicon & Intel · macOS 13+