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dbdiagramr

Free, open-source web tool that generates interactive ER diagrams from any PostgreSQL connection string. No signup required paste your connection string and visualize your schema in seconds.

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Cost / License

  • Freemium (Subscription)
  • Open Source (MIT)

Platforms

  • Online
  • Self-Hosted
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  • Licensing

    Open Source (MIT) and Freemium product.

  • Pricing

    Subscription that costs $8 per month + free version with limited functionality.

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  • Supported Languages

    • English

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What is dbdiagramr?

dbdiagramr is a free, open-source alternative to dbdiagram.io for generating entity-relationship diagrams from PostgreSQL databases.

Features:

  • Generate ER diagrams from any PostgreSQL connection string (Supabase, Neon, Railway, local)
  • No signup, no account required paste and go
  • Interactive pan/zoom with drag-and-drop
  • Schema library with pre-built templates (Supabase, NextAuth, Laravel, Django, Stripe, E-commerce)
  • Export to PNG/SVG
  • AI-optimized (llms.txt) for AI search engines
  • Self-hostable (MIT license)

Best for: Developers who want to quickly visualize an existing PostgreSQL database without installing desktop tools.

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