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schemalens

v0.0.5

Published

5 months ago

A local-first developer tool that generates living architecture diagrams from your database schema. Point it at a database, and SchemaLens visualizes tables, columns, and foreign-key relationships on an interactive canvas.

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SchemaLens

A local-first developer tool that generates living architecture diagrams from your database schema. Point it at a database, and SchemaLens visualizes tables, columns, and foreign-key relationships on an interactive canvas.

Supports PostgreSQL, MySQL, SQL Server, Oracle, and SQLite.

Features

BFS crawl from any table to explore related tables up to a configurable depth
Ghost nodes for references beyond the crawl boundary, expandable with a click
Schema-aware navigation with cross-schema relationship tracking
Schema diffing to see what changed between refreshes
Workspace persistence so you can save and restore canvas layouts
Runs entirely on your machine — no data leaves localhost

Install

npm install -g schemalens

Usage

schemalens

This starts a local server and opens the UI in your browser. Connect to a database from the interface.

Set a custom port with the SCHEMALENS_PORT environment variable:

SCHEMALENS_PORT=4000 schemalens

Development

SchemaLens is a TypeScript monorepo using npm workspaces.

npm install
npm run dev

This starts the backend (port 3100) and Vite dev server (port 5173) concurrently.

License

MIT