LOCAL-FIRST · FREE

Data Architect

Compare two datasets, find quality problems, and design safer joins. Your files stay in this browser.

Left datasetCSV, JSON or JSONLRight datasetCSV, JSON or JSONL

Recommended mappings

Left field	Right field	Type	Score	Value match	Cardinality	Join calculation	Advice

Left quality

Right quality

Database and Excel support

The downloadable Python engine supports Excel, Parquet, PostgreSQL, MySQL/MariaDB and SQLite. Direct database credentials are intentionally not accepted by this public browser app.