About

Last updated 11 September 2026

YourERD is an online tool for drawing entity-relationship diagrams right in your browser. No account is needed to draw entities and relationships and export MySQL DDL; signing in adds cloud storage and share links on top of that.

Why it exists

A lot of real-world data modelling — especially the kind taught and practised in Korea — uses Barker notation together with a technical (English) name and a human-readable (native-language) name side by side for every table and column. Few free online ERD tools supported both well, so YourERD set out to fill that gap: automatic foreign keys that respect identifying vs. non-identifying relationships and physical/logical name pairs are all things that came directly from that practice.

What it aims for

• No account required to start — signing in is only needed for cloud storage and sharing.
• Faithful to the notation — Barker's dashed/solid halves and crow's-foot markers follow the actual rules rather than a simplified approximation.
• Output you can actually use — the goal is a diagram that turns into working MySQL DDL, not just a picture.
• Kept improving — features get refined based on problems and requests that come up in real use. The Articles section (Korean for now) also covers data modelling itself, not just how to use the tool.

Free to use

YourERD is provided free of charge, and part of the running cost is covered by ads shown on the site. See the Privacy Policy for details.

Who runs it

YourERD is run by an individual, not a company. Questions and feedback are welcome through the contact page.