Parquet Viewer
Open web viewer Get the app
Local-first data explorer

See inside your Parquet files.

Explore schema, stats, and rows in a fast data grid. Open local or remote Parquet, CSV, TSV, JSON or JSONL — private, never uploaded.

Open web viewer Get the macOS app
Built for people who read schemas

Everything, at a glance.

Columnar storage, a columnar viewer. Types are color-coded, numbers are tabular, metadata is one glance away.

Read in place, never uploaded

Files are read where they live — only the bytes your view needs are streamed. Nothing hits a server, so even multi-gigabyte files open in moments.

no upload streams on demand stays on your machine

Schema & statistics

Walk the full schema — types, nesting, repetition — each column color-tagged. Min, max, distinct count, null ratio and size come straight from metadata. No full scan.

INT64 UTF8 TIMESTAMP min / max 12% null

Filter, sort & query — or ask AI

Filter and sort with type-aware operators, or run full SQL — joins, aggregates, CTEs, windows. Or describe what you want instead, and let AI write the SQL.

salary > 100,000 SELECT GROUP BY AI-written SQL millions of rows

Export & share

Export the current view to CSV, JSON or Parquet, written locally. Or share a link to exactly what you see — it rides the URL #hash, so it never reaches our servers.

CSV JSON Parquet shareable link stays private
Formats & sources

Any common format, wherever it lives.

Parquet first, but it reads CSV, TSV, JSON and JSONL too — from disk, a URL, Hugging Face or S3.

Formats

.parquet Apache Parquet .csv CSV .tsv TSV .json JSON .jsonl JSON Lines .gz · .zst Compressed

Sources

Local files Folders Remote URL Hugging Face Amazon S3 Drag & drop
Try a dataset

Open a curated view in one click.

Each card opens the web viewer with a public dataset and a useful filter, sort or SQL query already set up.

US unemployment

TSV · 34 KB

Unemployment rate for 3,218 US counties, keyed by county FIPS code.

Highest unemployment first GitHub

NYC Airbnb

Parquet · 3.7 MB

49K listings — prices, neighborhoods, room types & review dates.

Priciest Manhattan listings Hugging Face

Census income

Parquet · 540 KB

33K people with age, job, education, hours worked and income bracket.

High-income share by education Hugging Face

Dolly 15k

JSONL · 13 MB

15,010 instruction, context & response records — a classic LLM fine-tuning set.

Creative-writing prompts only Hugging Face
Pricing

Free to read. Pro to ask.

The viewer is free, and your files always stay on your machine. Pro lifts the limits on AI — a smarter model and room to keep asking.

Free

$0 forever

Everything you need to open and explore.

  • Read files locally — never uploaded
  • Full schema, statistics & metadata
  • Filter, sort & full SQL
  • Export up to 1,000 rows to CSV, JSON & Parquet
  • 10 AI queries every 5 hours
Open web viewer
Pro

Pro

$8 / month

or $72 / year — three months free.

  • Everything in Free
  • A smarter AI model for SQL
  • Faster answers from a quicker AI provider
  • Far higher AI query limits
  • Export every row — no caps
  • Cancel anytime
Get Pro

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 read locally — never uploaded.

Open web viewer Chrome · Safari · Firefox · Edge

macOS app

Native · works fully offline

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

Download on the App Store Apple silicon & Intel · macOS 15+