Parquet Viewer — DBConvert

Open a .parquet file in the editor: schema, row groups, codec, and SQL across several files at once. Nothing leaves your machine.

What the file tells you before a row is read

Parquet keeps its schema and its statistics in the footer, so the shape of the file is known without scanning it. All of this appears the moment you open it:

• Row groups, and the codec that compressed them
• Size on disk against uncompressed size
• Every column with its type
• Per column: minimum, maximum, how many nulls, bytes in the file
• The writer that produced the file

Several files at once

Select more than one .parquet file in the Explorer and each becomes a named view, so the SQL reads like SQL:

SELECT c.country, count(*) AS orders, round(sum(o.amount), 2) AS total
FROM orders o JOIN customers c USING (customer_id)
GROUP BY 1 ORDER BY 3 DESC

Same format only. Joining a Parquet file to a JSONL one is a different job, and that one is DBConvert Streams.

What it does not do

It is read-only — SELECT and WITH … SELECT, nothing that writes — and it needs a file that already exists.

Where the file goes

Nowhere. The editor reads it from disk and hands it to the panel; the panel parses it with WebAssembly in the editor itself. There is no server, no account, and no network call.

The other two

Same viewer, one per format — install only the one you need, so a SQLite user never downloads the Parquet engine.

• SQLite Viewer — VS Code · Open VSX · Chrome
• JSONL Viewer — VS Code · Open VSX

Built by DBConvert. The same viewer runs in a browser tab at streams.dbconvert.com/parquet-viewer if you would rather not install anything.