Universal In-Browser Data Converter
Transform datasets between Apache Parquet, Excel (.xlsx), CSV, and JSON with ZSTD compression and instant downloads in client-side WebAssembly.
Key Features & Client-Side Capabilities
- All-in-One Format Conversion: Effortlessly switch between CSV, Excel, Parquet, and JSON in one unified workspace.
- 100% Client-Side Privacy: All conversions run strictly in local browser memory. Sensitive datasets are never sent to external servers.
- High-Ratio ZSTD Compression: Compress bulky text spreadsheets into high-speed columnar Parquet files up to 90% smaller.
Frequently Asked Questions
Which formats can I convert between?
You can convert between CSV, TSV, Microsoft Excel (.xlsx), Apache Parquet, and JSON / NDJSON in any combination.
Do my files get uploaded to a cloud server?
No. Conversions run entirely inside your browser tab using DuckDB-Wasm and SheetJS in local RAM.