Design clean, accurate database relationships fast.
Turn your data model into a precise ERD with AI. Define entities, attributes, keys, and relationships, then preview, refine, and export in seconds.
Why use this ERD tool
AI speeds up modeling while you stay in control.
AI entity modeling
Describe your data and get a complete entity relationship diagram proposal in seconds.
Accurate keys & roles
Mark PK, FK, and UK clearly so constraints are obvious to everyone.
Clear cardinality
Use exactly one, zero or one, one or more, or zero or more with readable labels.
Identifying types
Choose identifying or non‑identifying relationships to reflect real dependencies.
Layout & readability
Switch direction (TB/BT/LR/RL) and adjust font size for clarity.
Zoom, export, share
Zoom and pan smoothly, then export PNG/SVG or share a link.
Bring your data
Type manually
Enter entities, attributes, and key markers in seconds.
Paste from sheet
Paste columns or tables; AI maps them to entities and relationships.
Import file (Pro)
Upload common files to draft your ERD instantly.
Start with template
Pick a ready ERD and adapt it to your schema.
Share and export
Download images
Export crisp PNG or SVG for docs, decks, and wikis.
Share link
Send a view link so teammates can review instantly.
Embed anywhere
Add the ERD to your site or knowledge base with a simple snippet.
About this ERD tool
This AI entity relationship diagram generator helps you design database structures fast. Describe your model and get a tidy ERD you can edit, preview, and export. It highlights keys, cardinality, and relationship types clearly. Build trust with diagrams that are accurate and easy to read.
- ✓Purpose‑built for ER diagrams
- ✓AI suggestions with full manual control
- ✓Clean, readable layouts for any audience
- ✓Fast export and sharing options
- ✓Works great for teaching, planning, and delivery
Quick facts
How it works
From idea to export in a few clicks.
Describe or paste
Tell the AI about entities, attributes, keys, and relationships; or paste columns from a sheet.
CUSTOMER (PK: customer_id) places ORDER (1..*). ORDER contains ORDER_ITEM (1..*). PRODUCT included in ORDER_ITEM (0..*).
Review entities & keys
Confirm names, map attributes, and set PK/FK/UK. Adjust comments for clarity.
ORDER(order_id PK, customer_id FK → CUSTOMER.customer_id, order_date).
Define relationships
Select cardinality and type (identifying or non‑identifying). Add optional labels.
CUSTOMER —places— ORDER (1 to many, non‑identifying).
Tweak & export
Choose layout direction, set font size, enable zoom/pan, then export or share.
LR layout, readable font, SVG export for docs.
Use cases
Built for teams that model data for real systems.
Design robust schemas
Plan tables and constraints before coding migrations; perfect for microservices, event stores, and legacy refactors.
Model dimensions and facts
Sketch star/snowflake structures, surrogate keys, and bridge tables for clear analytics.
Teach data modeling
Explain entities, attributes, and relationships with simple visuals students understand.
Map customer flows
Capture CUSTOMER, ORDER, PRODUCT, and ORDER_ITEM links for billing, inventory, and fulfillment.
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.
AI vs. traditional ERD
Model faster with fewer errors.
Traditional diagramming
- ✗Manual box-and-line drawing is slow
- ✗Hard to keep keys and cardinalities consistent
- ✗Layout adjustments consume time
- ✗Starting from scratch leads to missed entities
- ✗Sharing requires extra formatting
AI‑assisted ERD
- ✓Instant draft from a short description
- ✓Consistent PK/FK/UK and cardinality labels by default
- ✓Smart, tidy layout with one click
- ✓Templates and examples reduce setup
- ✓Easy export and share for quick feedback
ERD generator FAQs
What is an entity relationship diagram generator?
It’s a tool that creates ER diagrams showing entities, attributes, and relationships in a database model. This generator uses AI to propose a clear, accurate diagram you can edit and export.
How does the AI ERD generator work?
Describe your data model in plain language or paste columns. The AI infers entities, attributes, keys, and relationships, selects cardinality and relationship types, and outputs a readable ERD you can refine.
Can I set PK/FK and cardinality exactly?
Yes. Mark primary, foreign, and unique keys. Choose cardinality from exactly one, zero or one, one or more, or zero or more. You can also label relationships for added clarity.
Can I change layout direction and font size?
Yes. Switch between top‑to‑bottom, bottom‑to‑top, left‑to‑right, or right‑to‑left, and set a comfortable font size. Zoom and pan help present large models.
Is this a free entity relationship diagram generator?
Core features are free, including instant preview and image export. Optional Pro features accelerate setup with uploads and advanced AI refinement.
Inclusive by design
- ✓Keyboard navigation for editing and zoom
- ✓Clear labels and contrast for readability
- ✓Layout choices to reduce visual clutter
- ✓Screen‑reader friendly titles and descriptions
- ✓Zoomable canvas for low‑vision access
Privacy and control
- •Your work stays yours; you decide what to share
- •We don’t sell your data or diagrams
- •Delete charts or your account at any time
- •Share links can be revoked whenever you choose
- •Exports are generated on demand and can be removed by you
Design your ERD now
Describe your data model and get a clean, editable diagram in seconds.