ParquetView

Convert Parquet to CSV online

Spreadsheets still speak CSV. Parquet is what data teams ship. Converting the whole file is often a mistake: a 200-column extract becomes a 2 GB CSV nobody can open. Convert the slice you need. Need records instead of a spreadsheet? Use the Parquet to JSON converter.

In ParquetView

  1. Open the viewer and drop the Parquet file.
  2. Hide columns you do not want (the column panel at the bottom of the grid). Exports include visible columns only.
  3. Filter a header, search, or run SQL, for example SELECT user_id, event_time FROM events WHERE dt = '2026-08-01'.
  4. Open Export and choose CSV. JSON and Parquet are available if you need those instead.

Very large exports are capped at 100,000 rows so the browser stays stable. If you need more, filter harder or convert the file locally with your own tools.

Why not convert everything?

CSV drops types (timestamps become strings, integers become floats in Excel). Nested Parquet structs flatten poorly. JSON explodes in size. Use CSV when a person will look at the file. Use JSON when a program expects records. Stay in Parquet when the next consumer is a warehouse.

Command line alternative

If you already work in a notebook, you can convert with pandas or a local SQL engine. ParquetView is the same idea without installing extra software, useful on a locked-down laptop.

Related

Try it on your file

Open the viewer and drop a .parquet. Local files stay in the browser.

Open the viewer All guides