CONCRETE EXAMPLE
CSV → Parquet
BEFORE
→sales.csv
AFTER
sales.parquet · Snappy/Zstandard compression
ONLINE TOOL
CSV / JSON to Parquet
Locally convert CSV, TSV, JSON or NDJSON to compressed analytical Parquet with DuckDB-WASM.
Local processingNo account required
Your data stays in the browser
Processed content is not uploaded to WorkToolset. Required libraries may be loaded by the site, but the file stays in the browser.
Limitations to know
- Types are inferred automatically and should be reviewed before critical business use.
- The tool does not yet convert XLSX directly to Parquet.
A straightforward workflow.
- 1Prepare the required input and choose useful options.
- 2Review previews, warnings and limitations before export.
- 3Download a new copy or report: the original stays unchanged.
Frequently asked questions
Are my files uploaded to WorkToolset?
No. This tool runs locally in your browser.
Is my original file modified?
No. WorkToolset creates a new copy or export.
Do I need an account?
No for this free tool. Accounts are mainly used for favorites, presets and future workflows.