PostgreSQL ERD ToolGenerate interactive PostgreSQL ERDs from SQL DDL with SchemaIQ.SchemaIQ is a free, browser-based PostgreSQL ERD tool. Paste SQL DDL and generate an entity-relationship diagram showing tables, columns, primary keys, foreign keys, and indexes. Every foreign key becomes a column-level relationship line, so you can see exactly how your PostgreSQL schema connects.

Import CREATE TABLE, ALTER TABLE, CREATE INDEX, and CREATE TYPE ... AS ENUM

Automatic foreign-key relationship detection

One-to-one, one-to-many, and many-to-many classification

Export the ERD as PNG or SVG

Runs entirely client-side — your DDL stays in your browser

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