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.
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.
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.
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.
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.
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.
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.
From file to slice in about a minute.
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.
Inspect & filter
Read the schema and statistics, then filter and sort the rows you care about with type-aware operators.
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 installOpen the viewer in any modern browser. Files are still read locally — they never leave your machine.
Open web viewer Chrome · Safari · Firefox · EdgemacOS app
Native · works fully offlineA 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+