View, edit, and visualise Entity Relationship Diagrams (.erd.json) for Microsoft Dataverse and SQL Server right inside VS Code. Click any .erd.json in the Explorer to open the visual editor; mappings between two ERDs (.erdmap.json) are supported via the same custom editor.

Features

Custom editor for .erd.json — opens from the Explorer like any other file. Edit visually; saves through the document write back to disk via VS Code's normal save flow.
Mapping containers (.erdmap.json) — opening one drops you into Split View with both ERDs side by side and column-mapping support.
Imports — Dataverse solution .zip, dineug/erd-editor JSON, Mermaid erDiagram.
Exports — native .erd.json, mapping .erdmap.json, mapping → Markdown.
Demo data generation with FK-respecting topological sort.

Working with remote repositories

The extension treats .erd.json files as local files in your workspace. Use VS Code's built-in Source Control panel and integrated terminal to clone, commit, and push:

GitHub / Azure DevOps clone: Ctrl+Shift+P → Git: Clone.
Commit + push: standard VS Code Source Control workflow.

The extension itself does not implement remote-repository integration — that's VS Code's job, and it does it better.

Requirements

VS Code 1.85 or newer.
A workspace folder containing .erd.json (or run Dataverse ERD: New Diagram to create one).

Getting started

Install the extension.
Open a folder that contains .erd.json files (or run Dataverse ERD: New Diagram from the command palette).
Click any .erd.json in the Explorer — the visual editor opens automatically.
For two-way column mapping: open an .erdmap.json file, or run Dataverse ERD: Open Split View and pick two ERDs.

Commands

Dataverse ERD: New Diagram — create a fresh empty ERD in the workspace folder.
Dataverse ERD: Open Split View — open two ERDs side-by-side for column mapping.

Privacy

The extension runs entirely on your machine. The only outbound network calls happen when you explicitly use the Import from Dataverse... feature, which authenticates against your Dataverse environment.

No telemetry, no analytics, no third-party hosts.