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What is Schemity?
Schemity is a native desktop ERD tool built for software engineers who need to design, document, and manage database schemas without relying on cloud services. It works offline, stores everything in local JSON files, and requires no account. One-time purchase, no subscription.
With Schemity, you can break down complex schemas into focused Context Views, drag-and-drop relationships, and leverage smart features like auto junction tables, check constraint documentation, and custom entity colors. Import SQL files to instantly generate visual ERDs, or use the AI assistant (BYOK) for private, cloud-free schema creation.
All changes are saved locally and can be version-controlled via Git. The tool runs on macOS, Windows, and Linux, and works on locked-down corporate laptops behind VPNs or air-gapped networks.
How to use Schemity
- 1
Download and install Schemity on macOS, Windows, or Linux.
- 2
Create a new ERD or import SQL to generate entities automatically.
- 3
Drag fields between entities to define relationships (1:1, 1:N, N:N).
- 4
Organize views with Context Views to focus on specific parts of the schema.
- 5
Review and export migration SQL diffs for safe database changes.
Key features
Break complex schemas into focused Context Views for different perspectives.
Create relationships (1:1, 1:N, N:N) with drag-and-drop and auto junction tables.
Git-native JSON storage keeps schemas in your repo, never on a third-party server.
Import SQL files or dump to instantly generate a visual ERD.
AI assistant with BYOK support for private, offline AI-driven schema design.
Use cases
- Design database schemas offline for NDA or air-gapped projects.
- Reverse engineer production databases for documentation.
- Rapid prototyping of new system architecture.
- Audit and handover documentation preparation.
- Team collaboration via Git without cloud dependency.
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Frequently asked questions about Schemity
Common questions to help you decide if Schemity is right for you.