Apps/Visualize & map

🗄️ ER Diagrammer

The ER Diagrammer lets you sketch a data model — drag tables, add fields and primary keys, and connect relationships — right in your browser.

Explore now — it's free

Or get every app + all QMS templates with membership · $9/mo or $99/yr.

mypmp.in/app/er

🗄️▶Click to open the live app

⚡ No signup to try — opens instantly in your browser

💾 Auto-saves as you work; cloud sync when you unlock it

📄 Export to PDF, CSV or JSON — or print a clean report

👤 Who uses it

Data & solution architects
Business & systems analysts
Developers & DBAs
Product managers

📍 Where it's used

Data modelling
Database design
System analysis & design
Documentation & handover

About ER Diagrammer

The ER Diagrammer lets you sketch a data model — drag tables, add fields and primary keys, and connect relationships — right in your browser. Your work auto-saves as you go — a MyPMP membership syncs it across every device, and you can export to PDF, CSV or JSON anytime.

How it works

1. Open it — no account needed, nothing to install.
2. Fill it in — everything auto-saves in your browser as you type.
3. Share it — print, export, or become a member to sync across devices.

Frequently asked questions

What is an ER diagram?＋

An Entity-Relationship diagram showing database tables (entities), their fields and how they relate.

How do I connect two tables?＋

Use the link button on a table, then click the table you want to connect it to.

Can I move tables around?＋

Yes — drag any table by its header.

☁️ Save to the cloud

Free to use & auto-saves in your browser. Cloud save across devices is a paid feature — unlock this app, or get everything with membership.

All apps + QMS · $9/mo or $99/yr →

Open ER Diagrammer