DrawSQL

Free plan available
No credit card

What is DrawSQL?

DrawSQL diagrams your database structure from raw SQL, no account required. Paste in your code and you get an interactive schema showing tables, relationships, and data types specific to your database driver, whether that's PostgreSQL, MySQL, or others. The tool handles driver-aware types properly, so what you see matches what you built. Real-time collaboration means teams can review schema changes together before deployment. The catch is manual entry: you're pasting SQL rather than connecting directly to a live database on the free tier, and documentation on advanced features is sparse. It's for teams documenting existing schemas, onboarding new developers, or reverse-engineering legacy databases you've inherited. If you need live database connections or detailed customisation guides, look elsewhere.

Key features

SQL import

Paste SQL code to automatically generate schema diagrams

Driver-aware types

Recognises and displays database-specific data types correctly

Real-time collaboration

Work with team members on diagrams simultaneously

Team reviews

Built-in tools for reviewing and commenting on schema changes

No signup required

Free tier works without creating an account

Interactive diagrams

Click and handle through schema relationships visually

Pros & cons

Advantages

No account needed to get started; immediate access to core functionality
Handles multiple database systems with proper type recognition
Real-time collaboration makes it practical for teams
Free tier is genuinely useful for basic diagramming and sharing

Limitations

Limited documentation on advanced features or customisation options
Free tier may have restrictions on diagram size or collaboration features compared to paid plans
Requires manual SQL entry rather than direct database connections on free tier