Data tools

These tools handle common data engineering and analysis tasks that typically require installing software or pasting data into an external service. The database schema visualizer parses CREATE TABLE SQL and renders an entity-relationship diagram with foreign key arrows and draggable nodes — useful for documenting an existing schema or reviewing a migration before it runs. The visual SQL query builder constructs formatted queries from table, filter, and join rows without typing raw SQL.

The CSV tools cover format conversion, deduplication, and comparison: CSV to JSON handles bidirectional conversion with delimiter auto-detection and type inference, the de-duplicator removes rows by selected key columns with configurable keep-first or keep-last behavior, and the diff viewer compares two CSV files by key column and highlights added, removed, and changed rows. All processing runs in your browser with no data sent to a server.