Free database tools
Every dbdiagramr tool in one place. Pick what you need — diagrams, health checks, generators. All free, no signup, private by default.
PostgreSQL ER Diagram
Paste a connection string and see your live PostgreSQL schema as an interactive ER diagram in under 10 seconds.
Schema Health Analyzer
Paste SQL and get a graded schema health report: missing keys, unindexed foreign keys, naming drift — each with a fix.
Supabase Schema Diagram
Visualize your Supabase database — auth, storage, and your own tables with every foreign key drawn.
Free Schema Generator
Turn any PostgreSQL SQL dump into a clean schema diagram. Free, instant, no account needed.
Database Diagram Online
Create a database diagram online without installing anything. Paste SQL, drag tables, export PNG or SVG.
Schema Visualizer
Explore your PostgreSQL structure at a glance — tables, columns, types, and relationships in one view.
SQL Formatter
Paste messy SQL and get clean, consistently formatted PostgreSQL. Keyword casing, smart indenting, copy or download.
Just want to see your database?
Paste a PostgreSQL connection string and get an interactive ER diagram in under 10 seconds. No signup, no setup.
Try it free →