OliMat Data Explorerby OliMat Systems
Home / Parquet viewer
Parquet viewer for Windows

Parquet viewer for Windows

Open, inspect and analyze large Parquet files on your own PC. See rows, schema and metadata, filter, query with DuckDB SQL and export to CSV or Excel — free, local and without uploading your data.

Get it from Microsoft StoreOther ways to download

Windows 10/11 · No account · No telemetry · Also opens CSV, Excel, JSON, Arrow and R data (RDS/RData).

Getting started

How to open a Parquet file

A good Parquet viewer should show the file right away, with no database to set up and no scripts.

01

Install and open

Install from Microsoft Store and open OliMat Data Explorer on Windows.

02

Drag the file

Drag your .parquet (or use "Open file"). Also .pq, .arrow and .feather.

03

Explore instantly

See rows, schema and metadata with no import or conversion.

View a Parquet file

Rows, schema and metadata

Like any solid Parquet file viewer, it shows the data in a paginated grid to page through millions of rows, sort and search. It also opens the format's full structure:

  • Rows with smooth paging, sorting and per-column search.
  • Schema: names, types and nested structure.
  • Parquet metadata: row groups, compression, encodings and statistics.
  • Per-column profile: nulls, percentiles, outliers and distribution.
Beyond reading

Query, join and convert

It is not just a Parquet reader: you can analyze without leaving the tool.

  • DuckDB SQL straight over the file, with JOINs across several files.
  • Visual filter that writes the SQL for you (you learn by seeing it).
  • Convert Parquet to CSV or Excel, and also to JSON, Arrow or SQL.
  • Pivot tables, correlation, charts and maps when there are coordinates.

See the 12 modules and all features · Learn SQL with DuckDB

Open large Parquet files

DuckDB queries the file by columns without loading it fully into memory, so a file with millions of rows opens fast and pages smoothly. Ideal when a spreadsheet falls short.

Local, private processing

Your Parquet file is processed on your own PC. There is no account, no mandatory cloud and no telemetry; your data is not uploaded to any server. See the privacy policy.

FAQ

Parquet viewer: common questions

How do I open a Parquet file on Windows?
Install OliMat Data Explorer from Microsoft Store, open it and drag your .parquet. You see rows, schema and metadata instantly.

Is the Parquet viewer free?
Yes, the full app is free, with no locked features and no subscription.

Does it upload my files to the internet?
No. Everything is processed locally with DuckDB.

Can I convert Parquet to CSV or Excel?
Yes, export to CSV, Excel, JSON, Arrow or SQL.