Parquet Fox

Online CSV viewer

Open CSV files. Query with SQL. Export to CSV, Parquet, or JSON.

Files stay in your browser. Nothing is uploaded to a server.

No file handy?

Drop your file here or click to upload

Parquet

CSV

JSON

Parquet up to 500 MB; CSV and JSON up to 2048 MB (compressed on disk). Browser memory use depends on content.

Continue Your Work

Edits aren't saved until you use Save to browser (or Save and leave). Opened originals can still show up here for reopen.

Once you open a file, it will be saved here for quick access.

How to open a CSV online

Open a CSV, query it with SQL, then export the result.

Drop a CSV, open a saved copy, or use Open from URL for a public or presigned HTTPS link. Everything stays local.

Use SQL to inspect, filter, and transform your CSV.

Download your modified data as CSV, Parquet, or JSON.

Built for analysts and engineers who need to inspect CSV files without uploading them.

Large CSV preview

Open a wide or long CSV in the tab and see columns, types, and sample rows without a spreadsheet install.

SQL on the CSV

Filter, aggregate, or join in SQL before you decide what to keep. The engine runs in the browser.

Export the slice

Download the result as CSV, Parquet, or JSON. You do not re-upload the file to convert it.

Stays on this device

The CSV is not copied to a Parquet Fox server for open, query, or export. Caps still apply on disk size.