What is Schemity?
Most ERD tools were built for DBAs. Schemity is built for software engineers. 9 MB, offline-first, Git-native. Your ERDs live as plain JSON in your repo, commit, diff, and review like code. Drag fields to create relationships. Flexible lines with custom waypoints. Check constraints as first-class citizens. Compare ERD to live DB and generate the exact SQL diff. Supports PostgreSQL, MySQL, SQL Server, Supabase. No Electron. No JVM. No subscription.
From the website
Schemity - The Offline Desktop ERD Tool for Software Engineers
Offline desktop ERD tool. Connects to your database, reverse engineers the schema, keeps every diagram as JSON in Git. Buy once, no cloud, no subscription.
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