Generate clean, database‑ready diagrams in minutes.
Create professional Entity Relationship Diagrams for PostgreSQL and MySQL. AI identifies tables, attributes, PK/FK keys, and cardinalities, then arranges a clear layout you can edit and export.
Why use this ERD tool
AI speed with database‑ready clarity for PostgreSQL and MySQL.
AI entity discovery
Describe your domain and get draft tables with sensible snake_case names and relationships.
PK/FK validation
Highlight primary, foreign, and unique keys so constraints are explicit and reliable.
Clear cardinalities
Set exactly one, zero or one, one or more, or zero or more with readable labels.
Identifying control
Mark relationships as identifying or non‑identifying to reflect real ownership in the model.
Readable layout
Choose left‑to‑right or top‑to‑bottom, adjust font size, and keep diagrams uncluttered.
Interactive preview
Zoom, pan, and inspect attributes without losing context, then export or embed instantly.
Bring your schema
Type entities
Enter tables and attributes by hand for quick sketches.
Paste spreadsheet
Paste columns from Sheets or Excel to define attributes fast.
Import SQL
Drop basic CREATE TABLE snippets to seed entities and keys.
Describe with AI
Explain your domain and let AI draft entities and relationships.
Export and share
Download images
Export crisp PNG or SVG ERDs for docs and slides.
Share a link
Send a view link to teammates for quick reviews.
Embed on site
Copy an embed to add your ERD to wikis and portals.
Collaborate fast
Gather feedback without version chaos or email chains.
About this ERD tool
This AI‑powered ERD generator helps you design PostgreSQL and MySQL schemas fast. It drafts entities, PK/FK, and cardinalities from descriptions. Edit in a clean canvas, preview instantly, and export. Ideal for teams that need clarity without complexity.
- ✓Optimized for PostgreSQL and MySQL patterns
- ✓Precise PK/FK/UK handling and labels
- ✓Identifying vs non‑identifying relationships
- ✓Flexible layout directions and font sizing
- ✓Fast export to PNG/SVG and simple embeds
At a glance
Build your ERD in minutes
From idea to clean diagram—no fuss.
Start with AI
Describe your app or paste simple table definitions. AI drafts entities, attributes, and first‑pass relationships.
Example: Customers place orders containing items from products.
Define entities
Add or edit tables, attributes, and mark PK/FK/UK in the Entities panel.
CUSTOMER(customer_id PK, email UK, name)
Set relationships
Choose source/target, cardinality, and identifying type in the Relationships panel.
ORDER → ORDER_ITEM: one to many, identifying
Tidy & export
Pick layout direction, tweak font size, preview, then download PNG/SVG or embed.
Layout: Left to Right; Export: SVG
Who this is for
ERDs that clarify data models across teams and projects.
Design normalized schemas
Map users, subscriptions, and billing with precise PK/FK and cardinality for PostgreSQL or MySQL.
Model catalog and orders
Lay out products, carts, orders, and inventory with identifying relationships for fulfillment flows.
Stage and marts planning
Sketch source tables, staging, and star schemas before implementing ETL.
Teach database design
Show classic ER patterns and constraints with a clean, readable layout.
Templates
Start with professionally designed templates
E-commerce Order Management ERD Template
This template visualizes how customers, orders, items, payments, shipments, inventory, coupons, addresses, and returns connect across the order lifecycle.
Online Store Products & Inventory ERD Template
Visualize how products, categories, inventory, orders, customers, suppliers, and warehouses connect in one clear ERD.
Shopping Cart & Checkout ERD Template for E‑commerce
Visualizes users, carts, items, orders, payments, shipping, coupons, and inventory across the checkout lifecycle.
SaaS User-Team-Subscription erd Template for Clean Data Models
Visualizes Users, Teams, Memberships, and a single Team Subscription with clear PK/UK/FK keys, roles, and ownership.
Multi-Tenant SaaS Database ERD Template
Visualize tenants, organizations, users, roles, permissions, plans, subscriptions, and resources—covering shared vs. isolated tenancy models.
CRM Contacts–Leads–Deals ERD: a clear, scalable model
This erd visualizes how Companies, Contacts, Leads, and Deals relate, including the many-to-many link between Contacts and Deals via Deal_Contact.
View All Templates
Browse the full library to find more templates tailored to your chart.
Why choose AI over manual
Less dragging, more designing.
Traditional ERD tools
- ✗Manual shape placement and endless alignment
- ✗Hard to maintain consistent PK/FK and naming
- ✗Cardinality often unclear or mislabeled
- ✗Slow to restructure when requirements change
- ✗Export and sharing feel like an afterthought
AI‑assisted ERD builder
- ✓Instant draft from a short description or SQL
- ✓PK/FK/UK surfaced consistently with clear badges
- ✓Explicit cardinality and relationship labeling
- ✓Smart auto‑layout that stays tidy as you edit
- ✓One‑click export, share links, and embeds
ERD FAQs
Does this ERD tool support PostgreSQL and MySQL?
Yes. The AI and editor are tuned for PostgreSQL and MySQL naming, PK/FK/UK constraints, and common modeling patterns. You can switch layouts and export clean diagrams for handoff.
How does the AI generate an ERD?
Describe your domain or paste basic CREATE TABLE snippets. The AI proposes entities, attributes, keys, and relationships with cardinalities. You can accept, edit, or add more detail before exporting.
Can I control identifying vs non‑identifying relationships?
Yes. Choose the relationship type in the editor so parent‑child ownership is clear in the diagram and downstream schema work.
What cardinalities can I set?
You can set exactly one, zero or one, one or more, and zero or more. Each relationship shows labels so constraints are unambiguous for reviewers.
Is there an online ERD editor without signup?
You can start free in the browser, create ERDs, and export images. Sign in later to save, share links, and embed diagrams.
Accessible by design
- ✓Keyboard navigation for editing and preview
- ✓Readable fonts with adjustable size
- ✓High‑contrast colors for edges and labels
- ✓Zoom and pan for low‑vision access
- ✓Clear labels on entities, keys, and relationships
Privacy and control
- •You decide what to share, download, or keep private
- •Try the editor without creating an account
- •Delete diagrams from your workspace anytime
- •We process your input only to generate the diagram
- •Exports stay on your device unless you share them
Design your ERD now
From idea to shareable diagram in minutes—free to start.