Database ER Diagram Creator, online and free
Design clear, accurate entity‑relationship diagrams in minutes. Generate tables, keys, and relationships with AI, then refine layout, cardinality, and labels instantly.
Why use this ERD tool
Purpose‑built for data modeling with AI assistance
AI builds your schema
Describe your domain and get entities, attributes, PK/FK, and relationship labels drafted for you.
Accurate cardinalities
Set one‑to‑one, one‑to‑many, and optionality with clear notations and readable connectors.
Identifying control
Choose identifying vs non‑identifying relationships to reflect real key dependencies.
Flexible layout
Switch layout direction (Left‑to‑Right, Top‑to‑Bottom), tune font size, and auto‑arrange for clarity.
Instant preview
See updates as you edit entities and relationships—no rebuilds or refreshes needed.
Zoom and inspect
Zoom, pan, and highlight keys so large schemas stay understandable and navigable.
Bring your data
Type entities
Enter tables, attributes, and keys directly in the editor.
Paste schema
Paste from a spreadsheet or DDL sketch to prefill entities and fields.
Upload file
Import CSV or JSON to draft entities and attributes fast (Pro).
Start from sample
Load the CUSTOMER–ORDER–PRODUCT example and adapt it to your schema.
Share and export
Download images
Export clean PNG or SVG for docs, slides, or tickets.
Share a link
Send a read‑only link so teammates can view your ERD anywhere.
Embed on sites
Paste a simple embed to show live diagrams in wikis and portals.
Version safely
Save iterations and restore previous diagram states when needed.
About this ERD tool
This AI‑powered Database ER Diagram Creator helps you design clean, accurate schemas fast. Describe your model, get a draft, and refine details instantly. Choose layout, mark keys, and add labels with ease. Export or share in a click. Built for clarity and speed.
- ✓AI suggests entities, keys, and relationships
- ✓Clear cardinality and identifying options
- ✓Flexible LR/TB layouts with instant preview
- ✓Zoom, pan, and highlight key fields
- ✓Fast SVG/PNG export and easy sharing
Quick facts
How it works
From idea to database ER diagram in minutes
Describe your model
Tell the AI what entities you have, their attributes, and how they relate, including PK/FK and cardinalities.
Entities: CUSTOMER(pk customer_id), ORDER(pk order_id, fk customer_id). Relationship: CUSTOMER 1..* ORDER (label: places).
Review the draft
The tool proposes entities, key markers, and relationships with labels. Adjust names, types, and relationship types.
Rename ORDER_ITEM to LINE_ITEM; set ORDER→LINE_ITEM as identifying.
Tune layout & labels
Pick Left‑to‑Right or Top‑to‑Bottom, tweak font size, and refine relationship labels for clarity.
Layout: LR; Font size: 12; Labels: CUSTOMER “places” ORDER.
Export & share
Download as SVG/PNG, share a link, or embed the live diagram in docs and wikis.
Export: SVG for Confluence; Share link with engineering channel.
Who it’s for
Clear ER diagrams for teams that design, build, or explain databases
Design application schemas
Model user, billing, and permissions domains quickly and keep specs in sync with reality.
Stage and warehouse modeling
Map source tables to staging and marts with explicit PK/FK and optionality.
Teach data modeling
Use simple ERDs to explain normalization, keys, and cardinality in lessons and labs.
Catalog and order flows
Show products, orders, and line items with clear identifying relationships for downstream teams.
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 this over traditional tools
Less friction, more modeling
Traditional ERD tools
- ✗Manual box‑and‑line drawing slows you down
- ✗Cardinality and key notation easy to mislabel
- ✗Layouts tangle as the model grows
- ✗Hard to keep diagrams and names consistent
- ✗Exporting and sharing adds extra steps
AI‑assisted ERD builder
- ✓Describe your domain; get a usable ERD draft instantly
- ✓Automatic PK/FK and cardinality suggestions reduce errors
- ✓Smart layout keeps entities readable at any size
- ✓Consistent naming and labels with quick edits
- ✓One‑click export, share links, and embeds
ERD tool FAQs
What is the Database ER Diagram Creator?
It’s an AI‑powered ERD tool that builds entity‑relationship diagrams from your description or edits. It identifies tables, attributes, primary/foreign keys, and relationships so you can design accurate database schemas faster.
How does AI improve ER diagram creation?
AI proposes entities, PK/FK pairs, and cardinalities from plain language. It also suggests identifying vs non‑identifying relationships and arranges a clear layout so you spend time validating, not drawing.
Can I change layout orientation (LR, TB, RL, BT)?
Yes. Choose Left‑to‑Right, Right‑to‑Left, Top‑to‑Bottom, or Bottom‑to‑Top based on readability and space. You can also adjust font size and spacing for dense areas.
Does it support identifying and non‑identifying relationships?
Absolutely. Mark relationships as identifying when a child’s PK includes the parent’s key, or non‑identifying when the link is via a separate FK.
Is there a free ER diagram creator mode?
Yes. You can create, customize, and export ERDs for free. Upgrades add time‑saving options like file uploads and advanced management.
Inclusive by design
- ✓Readable fonts and adjustable sizes for visual comfort
- ✓Accessible color contrast and focus states
- ✓Keyboard navigation for editing and layout
- ✓Screen‑reader friendly labels for entities and relationships
- ✓Zoom and pan for low‑vision users
Your data, your control
- •We don’t sell your data or diagrams
- •Your charts remain private unless you share a link
- •Delete diagrams or your account at any time
- •Optional sign‑in to save work; no sign‑up required to try
- •Embeds use secure, revocable links
Start your ER diagram now
Describe your database and get an AI‑drafted ERD in seconds. Free to try, easy to customize, ready to share.