Data tools
Schema diagrams and data helpers, private and instant in your browser.
Database schema visualizer
CREATE TABLE SQL to ER diagram, FK arrows, drag nodes, zoom and pan, table sidebar highlight, SVG download.
Visual SQL query builder
Dynamic table, filter, and join rows, live formatted SQL, dialect quotes, copy and format buttons.
CSV to JSON converter
CSV to JSON and JSON to CSV, delimiter auto-detect, type inference, 10-row preview, copy and download.
CSV de-duplicator
Dedup by selected columns, first or last keep, case and trim options, before/after preview, removed-row download.
CSV diff viewer
CSV A vs B with key-column match, added/removed/changed colors, cell highlights, filters, diff CSV export.