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dbdiagramr

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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

  • Free
  • Open Source (MIT)

Application type

Since

  • New

Updated

  • Updated Nov 2026

Platforms

  • Online
  • Self-Hosted
Dbdiagramr live preview
Feature 1 - uploading/pasting SQL schema and hovering over containers on DBdiagramr
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Feature 2- uploading/pasting SQL schema and searching on live preview on DBdiagramr
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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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