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erdflow

v0.1.0

Published

Local-first database schema IDE — detect Prisma, DBML, or SQL schemas and open an interactive ERD in the browser

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Links

Git

Maintainers

abhimanyujangidabhimanyujangid

Keywords

erddatabaseschemaprismadbmlsqldiagramentity-relationship

Readme

erdflow

Local-first database schema IDE — detect your project's schema, parse it, and open an interactive ERD in the browser.

npx erdflow

What it does

  1. Detects your schema file (Prisma → DBML → SQL)
  2. Parses it into a universal schema model
  3. Starts a local server at http://127.0.0.1:4317
  4. Opens the browser with an interactive entity-relationship diagram

Example output:

✓ Detected Prisma
✓ prisma/schema.prisma
✓ 12 entities · 2 enums · 11 relations · 3 indexes
→ http://127.0.0.1:4317/

Watching schema files for changes...

Quick start

From any project with a Prisma, DBML, or SQL schema:

npx erdflow

Or install globally:

npm install -g erdflow
erdflow

Usage

Auto-detect (default)

Detection order: prisma/schema.prisma → *.dbml → *.sql

Explicit schema path

npx erdflow --prisma ./prisma/schema.prisma
npx erdflow --dbml ./database/schema.dbml

Options

| Flag | Description | | --- | --- | | --port <number> | Server port (default 4317) | | --no-open | Skip auto-opening the browser | | --no-watch | Disable file watching | | --prisma <path> | Use a specific Prisma schema file | | --dbml <path> | Use a specific DBML file |

Examples:

npx erdflow --port 5000
npx erdflow --no-open --dbml ./docs/schema.dbml
npx erdflow --no-watch --prisma ./custom/schema.prisma

Supported formats

| Format | Location | Notes | | --- | --- | --- | | Prisma | prisma/schema.prisma | Models, relations, enums, indexes | | DBML | *.dbml | Tables, relationships, enums | | SQL | *.sql | PostgreSQL, MySQL, SQLite |

Live updates

With watch enabled (default), editing your schema file re-parses and pushes updates to the browser over WebSocket — no manual refresh needed.

When a parse error occurs during watch, the CLI prints the error and the browser shows an alert while keeping the last valid schema.

Requirements

  • Node.js ≥ 20

Related packages

| Package | Description | | --- | --- | | @erdflow/core | Universal schema types and validation | | @erdflow/web | React visualizer (embed in your app) | | @erdflow/layout | ELK.js graph layout engine |

Links

License

MIT © erdFlow