Work with Parquet files, entirely in your browser
View, query and convert Parquet files without installing Spark, pandas or anything else. All processing happens locally via WebAssembly — your files never leave your device.
344 ms
to open a 1.3 GB Parquet file — only the metadata footer is read
0 uploads
static site with no backend; there is nowhere to send your file
MIT
open source — verify the privacy claim in the code yourself
Parquet Viewer
Drop a .parquet file to inspect its schema, metadata and rows instantly.
SQL Workbench
Run SQL queries against local Parquet, CSV and JSON files with DuckDB.
Converters
Convert between Parquet, CSV, JSON and JSONL without uploading anything.
Converters
Guides
- How to Merge Multiple Parquet Files into OneCombine several Parquet files into a single dataset with DuckDB SQL in your browser — including files whose schemas don't quite match — or with pyarrow.
- How to Open a Parquet File Without Spark or PythonFive ways to open and inspect a Parquet file — from zero-install browser tools to DuckDB one-liners — and when each one makes sense.
- How to Open a Parquet File in Excel (Step by Step)Excel cannot read Parquet natively. Convert the file to CSV in your browser — and trim oversized files with SQL first — to get it into a spreadsheet.
- Parquet vs CSV: Size, Speed and When to Use EachA practical comparison of Parquet and CSV — file size, query speed, type safety and tool support — with concrete guidance on choosing.
- Query Parquet Files with SQL — No Database RequiredRun real SQL against local Parquet and CSV files using DuckDB in the browser: joins, aggregates and window functions with zero setup.