Local-first data wrangling

Work with tabular data without giving it away.

Convert, inspect, and join files directly in your browser. Local files stay on your device—no account, upload, or installation required.

Open File ConverterBrowse all tools

Local processing Free to use Best under 50–200 MB

customer-data.csv
customer_id
region
revenue
1001
North
12,480
1002
West
8,920
1003
South
15,610
Processing locally
Runs in your browserNo file uploadsNo account requiredOpen formats

Focused utilities

Choose a task and get it done.

Each tool has one job, a small interface, and no server round trip for local files.

File Converter

Convert CSV, TSV, Parquet, and JSON without uploading your file.

CSVParquetJSON

Profile

Inspect types, missingness, numeric statistics, and top values.

TypesMissingnessStats

Join

Combine two datasets with flexible keys and export the result.

LeftInnerFull

Privacy by architecture

Your local file is not a disguised upload.

DuckDB runs inside your browser. We do not send locally selected file contents to a Data Wrangler server or database.

Read the privacy details