Multi-engine, all free
Postgres, SQLite, and MongoDB — all shipped, all deep, no paid tier gating an engine.
Postgres, SQLite, and MongoDB — every engine free. Open source, MIT.
Schema tree, SQL editor with autocomplete, and a fast result grid — with format, EXPLAIN, history, saved queries, and CSV/JSON export a keypress away.

A tabbed designer for columns (type, nullable, primary key, unique, default, generated) and foreign keys — with a live CREATE TABLE preview you confirm before it runs. Sequences, materialized views, check constraints, partial and expression indexes, role grants, and table maintenance are all one click away.

Browse and query collections (find + aggregate), edit documents, run bulk updateMany / deleteMany, manage indexes and collections, read query plans, export to JSON/NDJSON, set schema-validation rules, and administer database users — all from the same keyboard-first UI.