Turn unfamiliar files into understood, useful data.
Import structured data, inspect its real quality, reshape it visually or with SQL, compare multiple datasets, and export the result. DuckDB-Wasm runs the work in a dedicated browser worker.
Selecting the best WebAssembly bundle and opening local storage.
CSV, TSV, JSON, NDJSON, XML, YAML, XLSX, Parquet, Arrow and SQLite. Everything is processed locally in your browser — files never leave your device.
- 01
Drop file
Ten structured-data formats
- 02
Understand data
Schema, types, nulls, duplicates and malformed rows
- 03
Transform or query
Visual recipes or local DuckDB SQL
- 04
Preview result
Paginated, typed result inspection
- 05
Export
Ten local output formats
Import broadly
CSV, TSV, JSON, NDJSON, XML, YAML, XLSX, Parquet, Arrow and SQLite.
Shape precisely
Filter, sort, rename, cast, deduplicate, clean nulls, flatten, pivot and calculate.
Work across files
Join, union, split, compare schemas and generate a row-level dataset diff.