Build database schemas in minutes
Turn ideas into precise Entity Relationship Diagrams. This database schema diagram tool uses AI to draft entities, attributes, PK/FK/UK keys, and relationship cardinality—then lets you refine layout and labels instantly.
Why choose this ERD tool
AI speed with precise, editable database diagrams
AI entity detection
Describe your domain and get entities, attributes, and sensible table names in seconds.
Keys made clear
Mark PK, FK, and UK with distinct badges for unambiguous schemas.
Cardinality & labels
Specify exactly one, zero or one, one or more, or zero or more, with optional relationship labels.
Smart layout control
Switch direction (Top–Bottom, Bottom–Top, Left–Right, Right–Left) for optimal readability.
Zoomable canvas
Enable zoom and pan to inspect large models without losing context.
Live preview
See changes instantly as you edit entities, attributes, and relationships.
Bring your data
Type entities
Quickly define tables and attributes by typing names and keys.
Paste columns
Paste fields from a spreadsheet to populate attributes fast.
Upload file (Pro)
Import CSV or spreadsheet data to seed entities and keys.
Start from sample
Load the CUSTOMER–ORDER–PRODUCT example to begin instantly.
Share and export
Export images
Download crisp PNG or SVG for docs, slides, or wikis.
Share link
Send a read-only link for quick reviews and sign‑off.
Embed anywhere
Embed your ERD in sites or portals for always‑current views.
Print ready
Clean layouts and labels render well in print-friendly formats.
About this ERD tool
This AI-powered database schema diagram tool helps you design accurate ER diagrams quickly. Describe your data, then refine entities, keys, and relationships. Adjust layout for clarity. Preview updates instantly. Export and share securely. Perfect for teams and solo builders.
- ✓AI drafts entities, attributes, and links
- ✓Clear PK/FK/UK notation and labels
- ✓Flexible orientation: TB, BT, LR, RL
- ✓Zoomable canvas for large models
- ✓Fast export to PNG or SVG
At‑a‑glance
Build your ERD fast
From concept to export in a few steps
Describe your schema
Type a short prompt (entities, key fields, and how they relate). The AI drafts a complete ERD.
“Customers place Orders; Orders contain Order Items; Products are included in Order Items.”
Refine entities & keys
Edit names, add attributes, and set PK/FK/UK per table.
ORDER.order_id = PK; ORDER.customer_id = FK → CUSTOMER.customer_id.
Define relationships
Choose cardinality and type (identifying or non-identifying). Add clear labels where helpful.
CUSTOMER —(1:N)— ORDER [label: places] (non-identifying).
Adjust display & export
Pick layout direction, set font size, enable zoom, then download or share a link.
Layout: Left to Right; Font size: 14; Export: SVG.
Who this is for
Purpose-built for ERD and database design workflows
Plan application databases
Model user, order, and product tables with clear PK/FK mapping for backend services.
Design warehouse schemas
Map source-to-core relationships for staging and dimensional models.
Teach data modeling
Explain normalization, keys, and cardinality with visual examples.
Document system data
Keep living ERDs for analytics catalogs and team handoffs.
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.
Better than traditional tools
From manual diagramming to AI‑assisted modeling
Traditional ERD workflow
- ✗Manual entity creation is slow and error‑prone
- ✗Unclear key notation and inconsistent labels
- ✗Rigid layouts require tedious rearranging
- ✗Hard to keep diagrams readable at scale
- ✗Limited guidance for picking cardinality
AI‑powered ERD workflow
- ✓Generate entities, attributes, and relationships from a prompt
- ✓Consistent PK/FK/UK badges and relationship labels
- ✓Smart layout options for instant clarity
- ✓Zoomable canvas keeps large models navigable
- ✓Guided controls for cardinality and relationship types
ERD and AI FAQs
What is an ERD and why use this database schema diagram tool?
An ERD visualizes entities, attributes, and how tables relate. This tool uses AI to draft accurate schemas, mark PK/FK/UK, and set cardinality, so you design faster with fewer mistakes.
Can the AI create relationships and cardinality automatically?
Yes. Provide a short description and the AI suggests entities, relationship directions, and cardinality options like exactly one, zero or one, one or more, or zero or more. You can edit everything.
How do I mark primary and foreign keys?
Open an entity, set an attribute’s key to PK, FK, UK, or PK, FK. Key badges display clearly on the diagram for quick scanning.
Does it support identifying vs non-identifying relationships?
Yes. Choose identifying when the child’s PK includes the parent’s PK; otherwise use non-identifying. The diagram reflects the type for clarity.
Can I change the ERD layout orientation?
Absolutely. Switch between Top–Bottom, Bottom–Top, Left–Right, or Right–Left to match your space and reading direction. Font size and zoom controls improve readability.
Built for clarity and access
- ✓Readable fonts and adjustable sizes
- ✓Color choices with strong contrast
- ✓Keyboard-friendly editing where possible
- ✓Works well on desktop and mobile screens
- ✓Plain‑language labels for quick comprehension
Your data, your control
- •Your diagrams remain private unless you share links
- •You can export, download, or delete your work anytime
- •We don’t sell your data or training prompts
- •Embeds only show what you choose to publish
- •Minimal data retained to run the service
Design your ERD now
Turn ideas into a polished database schema in minutes