Is the ER diagram maker free?

Yes — you can create ER diagrams for free without signing up. Free accounts get a generous number of AI messages per month.

Does it support many-to-many and one-to-one?

Yes. Describe your cardinality (one-to-many, many-to-many, one-to-one) and the AI will render the appropriate relationship notation in the diagram.

MyMap

ER Diagram Maker

Describe your database entities, tables, or data model and AI builds an ER diagram — tables, columns, primary keys, and relationships.

mymap.ai

Schema

Message AI...

Auto

No credit card required · Free to start

Simple by design

How it works

Describe your schema

Tell us about your entities, tables, or data model. Include relationships (one-to-many, many-to-many) if you know them.

AI builds the diagram

MyMap's AI generates an ER diagram with entity boxes, attributes, primary keys, and relationship lines.

Refine and export

Add columns, change relationships, or ask AI to extend the schema. Export as PNG or PDF for docs or wikis.

Built different

AI that doesn't just chat — it sees, creates, and streams on your canvas.

Context-aware AI

AI that sees your whole canvas

AI understands node positions, connections, and neighbors — not just raw text. Select a node and it knows what's nearby, what's linked, and how to build on it.

Qwen 3 (235B)

Gemini 3 Flash

GPT-5 mini

Claude Sonnet 4.6

DeepSeek R1

Kimi K2.5

DeepSeek V3.2

Multi-model

Your AI. Your model.

10 models, 7 providers. Switch between Qwen, GPT, Claude, Gemini, and DeepSeek — no lock-in, ever.

Mind maps

Flowcharts

Diagrams

Slides

Visual formats

Every format, one chat

Mind maps, flowcharts, diagrams, slides — all from a single conversation. No tool switching.

✨

“a futuristic cityscape, neon lights, golden hour”

Klein 4BFluxSchnell+2

AI images

Images, right on canvas

Generate images directly onto your canvas. 5 Flux models, any aspect ratio, placed instantly.

Real-time

Watch it think

Nodes stream in as AI generates. Edges draw live. No waiting — watch ideas take shape in real time.

Frequently asked questions

Is the ER diagram maker free?: Yes — you can create ER diagrams for free without signing up. Free accounts get a generous number of AI messages per month.
Does it support many-to-many and one-to-one?: Yes. Describe your cardinality (one-to-many, many-to-many, one-to-one) and the AI will render the appropriate relationship notation in the diagram.

Ready to map your ideas?

Free to start. No credit card required.