Free ER Diagram Maker

An ER diagram maps out entities, attributes, and relationships in a database — the essential blueprint for any data-driven application. Developers, DBAs, and analysts use them to plan schemas, document existing databases, and communicate architecture. Describe your tables in plain English or paste a SQL schema, and AI generates the diagram instantly.

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3 EASY STEPS

How it works

Create stunning flow charts in minutes with our AI-powered tool. Transform your ideas into visual masterpieces effortlessly.

01Describe Your Process

Input your ideas or upload a file describing your workflow or process.

02AI Generation

Our AI analyzes your input and creates a professional flow chart based on your description.

03Customize and Share

Fine-tune your flow chart, then export or share it with your team instantly.

Why Choose Us

Idea to Diagram

Write naturally. We handle the translation from your thoughts to visual diagrams. No more wrestling with drag-and-drop tools.

Import Anything

PDFs, docs, images, or code - drop any file. We'll extract the logic and create a diagram that makes sense.

Fast Iterative Updates

Quick iterations are the key to good diagrams. Tell us what to change, and see updates in seconds, not minutes.

Export Anywhere

Get your diagram in any format you need - PNG, SVG, PDF, or even editable files. No lock-in, just flexibility.

Frequently Asked Questions

What is an ER diagram?01

An ER diagram (entity-relationship diagram) is a visual blueprint that shows how entities like customers, orders, and products relate to each other in a database. It maps out primary keys, foreign keys, and cardinality (one-to-one, one-to-many, many-to-many) so developers and analysts can understand the data structure at a glance.

How do I create an ER diagram with this tool?02

Describe your database in plain English — for example, 'a customer places many orders, each order contains multiple products' — and the AI generates a complete ER diagram with entities, attributes, and relationships. You can also paste a SQL schema or table list.

Can I import an existing database schema?03

Yes. Paste your CREATE TABLE statements, a list of tables and columns, or even a Prisma/Drizzle schema, and the tool will parse it into a visual ER diagram automatically.

When should I use an ER diagram?04

ER diagrams are essential for database design (planning tables before you build), documentation (onboarding new team members), migration planning (understanding what needs to change), and communication (showing stakeholders how data flows through your system).

Do I need database experience to use this?05

Not at all. If you can describe your data in plain language — 'users have profiles, profiles have posts' — the AI handles the technical notation. Database architects also use it to speed up work on complex schemas with dozens of tables.

What do the symbols in an ER diagram mean?06

Crow's foot notation is the most common ER diagram style. The symbols at the end of each line show cardinality: a single line means 'one,' a crow's foot (three-pronged) means 'many,' and a circle means 'zero (optional).' So a line ending in a crow's foot with a circle means 'zero or many.'

Is this ER diagram maker free?07

This tool is completely free with no signup required. Just describe your database and get your ER diagram instantly.

SEE IN ACTION

Real templates built with Free ER Diagram Maker

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