AI Entity Extraction
Describe your data model in plain language and the AI identifies entities, attributes, and relationships for you. Skip the blank-canvas problem entirely.
Chart & Visualization Tools
ERD Diagram Tool
Describe your tables and relationships in plain language and let AI generate a clean entity relationship diagram instantly. Customize attributes, keys, and cardinality with simple controls.
Features
Everything You Need in an ERD Diagram Tool
Purpose-built for database designers, developers, and architects.
Primary and Foreign Keys
Mark attributes as PK, FK, UK, or PK+FK with a single click. Key indicators are displayed clearly on every entity.
Cardinality Controls
Set source and target cardinality — exactly one, zero or one, one or more, zero or more — for every relationship using standard crow-foot notation.
Identifying vs Non-Identifying
Distinguish between identifying and non-identifying relationships to communicate whether child entities depend on their parent for identity.
Flexible Layout Directions
Arrange your ERD top-to-bottom, left-to-right, or in reverse to suit your diagram's complexity and reading flow.
Zoom, Pan, and Export
Navigate large schemas with smooth zoom and pan controls, then export a crisp high-resolution image the moment your diagram is ready.
Data input
Start Your ERD Any Way You Like
Describe in Plain Text
Type your business logic and let AI extract entities, attributes, and relationships automatically.
Build Manually
Add entities one by one, define attributes with types, and set primary or foreign keys with a click.
Paste Schema Snippets
Drop in a table list or column definitions and the tool structures them into a proper ERD.
Refine with AI Chat
Ask the AI to add a junction table, adjust cardinality, or rename attributes in natural language.
Share
Share Your Database Diagrams Everywhere
Export as PNG or SVG
Download pixel-perfect ERD images for documentation, presentations, and technical specs.
Share via Link
Send a shareable link so teammates and stakeholders can view your schema instantly.
Embed in Docs or Wikis
Paste an embed code to display your live ERD diagram directly inside Notion, Confluence, or your website.
Collaborate in Review
Export clean diagrams to attach to pull requests, design reviews, or client proposals.
About MakeCharts ERD Diagram Tool
MakeCharts is a free AI chart maker built for people who need professional diagrams fast. The ERD diagram tool combines AI entity extraction with a full-featured schema editor. It covers everything from simple two-table models to complex relational schemas — without requiring any diagramming software.
<2 minDiagram created
UnlimitedEntity types supported
PK, FK, UKKey types
4Layout directions
PNG & SVGExport formats
Workflow
From Schema Idea to ERD Diagram in 3 Steps
Describe Your Data Model
Type a plain-language description of your system — customers, orders, products — or start adding entities manually from the configuration panel.
AI Builds the ERD
The AI extracts entities, assigns attributes, sets key types, defines relationships, and applies cardinality rules — producing a complete entity relationship diagram instantly.
Refine and Export
Adjust attribute types, rename entities, change layout direction, and add missing relationships using the config panel. Export or share when ready.
Use cases
Who Uses This ERD Diagram Tool
Design Database Schemas Before You Code
Validate your data model visually before writing a single migration. Catch missing relationships and redundant tables early in the sprint.
Document Existing Data Pipelines
Reverse-document your warehouse tables and staging layers as ERD diagrams for onboarding, audits, and data governance reviews.
Teach and Learn Database Design
Build ERD examples for coursework, textbooks, and database fundamentals classes — students can interact with real schema concepts visually.
Communicate Data Requirements to Dev Teams
Turn business rules and process flows into structured ERD diagrams that developers can implement directly — no interpretation gap.
Templates
Start with professionally designed templates
E-commerce Order Management ERD Templateerd
Visualize your E-commerce Order Management ER Diagram fast. See entities, keys, and flows from cart to delivery—share, embed, and refine in minutes.
Online Store Products & Inventory ERD TemplateerdDesign a clean Online Store Products and Inventory ERD fast. Map products, stock, orders, and suppliers to prevent stockouts and speed decisions.
Shopping Cart & Checkout ERD Template for E‑commerceerdBuild a clear Shopping Cart and Checkout Entity Relationship Diagram in minutes—align teams, reduce defects, and ship a scalable data model.
SaaS User-Team-Subscription erd Template for Clean Data ModelserdVisualize a User, Team, and Subscription SaaS ER Diagram in minutes. Map ownership, memberships, and billing with a clean, customizable model.
Multi-Tenant SaaS Database ERD TemplateerdDesign a secure, scalable SaaS schema in minutes. Map tenants, users, roles, and billing with this Multi-Tenant SaaS Database ERD Template.
CRM Contacts–Leads–Deals ERD: a clear, scalable modelerdDesign a clean CRM Contacts, Leads, and Deals ER Diagram in minutes. Clarify relationships, prevent duplicates, and speed up implementation.
Related Tools
Create similar charts with these tools
AI ERD Diagram Generatorerd
Build accurate ER diagrams fast with our AI entity relationship diagram generator. Free, online, customizable, and export-ready (PNG/SVG). Create, edit, and share ERDs in minutes—no design skills needed.
AI ERD MakererdCreate accurate schemas fast with our ERD maker for database design. Auto-build entities and relationships, customize layout and labels, then export or share—free online.
ERD for Postgres & MySQLerdDesign clear ER diagrams for PostgreSQL and MySQL online. AI maps PK/FK, cardinality, and layout. Free to start, customize, and export or embed in seconds.
AI ERD Diagram GeneratorerdDesign clean ER diagrams fast. Our database schema diagram tool uses AI to map entities, PK/FK keys, and cardinality. Free to start, customize layout, and export.
Comparison
AI ERD Tool vs Traditional Diagramming
Why teams are ditching Visio and draw.io for AI-powered ERD generation.
MakeCharts ERD Diagram Tool
- Describe your schema in plain English — AI builds the diagram
- Entities, keys, and relationships generated automatically
- Standard crow-foot notation applied without manual setup
- Free to start — no software installation
- Update any entity or relationship in seconds
- One-click PNG and SVG export anytime
Traditional ERD Tools
- Manual drag-and-drop for every entity and line
- No intelligence — you define everything from scratch
- Steep learning curve for notation and cardinality symbols
- Expensive licenses or clunky free tools
- Hard to update when schema changes
- Export options buried behind menus
FAQ
ERD Diagram Tool — Frequently Asked Questions
What is an ERD diagram tool?
An ERD diagram tool lets you create entity relationship diagrams — visual maps of database tables, their attributes, and the relationships between them. It is used by developers, analysts, and architects to design, document, and communicate database schemas. MakeCharts provides a free AI-powered ERD diagram tool that generates diagrams from plain-language descriptions.
How do I create a free ERD diagram online?
Go to the MakeCharts ERD diagram tool, type a description of your data model, and let the AI generate the diagram for you. No signup is required for the free plan. You can also build your ERD manually by adding entities and relationships through the configuration panel.
Does this ERD tool support primary keys and foreign keys?
Yes. Each attribute can be marked as a Primary Key (PK), Foreign Key (FK), Unique Key (UK), or a combined PK+FK. Key indicators are displayed visually on every entity in the diagram so the schema structure is immediately clear.
What cardinality options are supported in the ERD generator?
The tool supports four cardinality types per relationship endpoint: exactly one, zero or one, one or more, and zero or more. These map to standard crow-foot ERD notation. You can set source and target cardinality independently for each relationship.
Can I use this as an ER diagram generator from text?
Yes — that is one of the core features. Describe your database in natural language and the AI extracts entities, assigns attribute types, sets key designations, and defines relationships. It works as a full ER diagram generator from a text description, saving significant manual effort.
What is the difference between identifying and non-identifying relationships?
An identifying relationship means the child entity cannot exist without the parent — its primary key includes the parent's key. A non-identifying relationship means the child can exist independently. The MakeCharts ERD tool lets you specify this for each relationship so your diagram accurately reflects your data model.
Can I export my entity relationship diagram?
Yes. Once your ERD diagram is ready, you can download it as a PNG image or as an SVG vector file. SVG exports are ideal for technical documentation where you need scalable, resolution-independent diagrams.
Is this ERD diagram maker suitable for large schemas?
Yes. The tool includes zoom and pan controls so you can navigate complex schemas with many entities. You can also choose layout direction — top-to-bottom or left-to-right — to make large diagrams more readable.
Do I need to know SQL or database design to use this tool?
No. The AI handles the translation from plain language to structured ERD notation. If you know your business rules — 'a customer places many orders' — the tool produces a proper entity relationship diagram. You can then refine it using simple controls in the config panel.
Can I share my ERD diagram with my team?
Yes. You can download the diagram and attach it to documentation, share a direct link, or use the embed code to display it in wikis, Notion pages, or your website. Sharing options make it easy to collaborate on schema design with distributed teams.
Built for Every Database Designer
- No SQL or diagramming experience required — describe your model in plain language
- Works on desktop, tablet, and mobile browsers without installation
- Plain-language AI explanations help beginners learn ERD concepts as they build
- Supports simple two-table schemas and complex multi-entity data models equally
- Free plan available with no time limit — no credit card needed to start
- Interface available in 12+ languages for global development teams
Your Schema Data Stays Yours
- Your entity and attribute data is used only to generate your diagram — not stored or shared
- No account required to create and export an ERD diagram on the free plan
- You control what you share — diagrams are private by default
- Download or delete your data at any time
- We do not sell or license user data to third parties
- Session data is handled securely and cleared when you close your session
Start now
Create Your ERD Diagram Free
From plain-language description to export-ready entity relationship diagram in under two minutes.
- AI entity and relationship extraction
- PK, FK, and UK key support
- Crow-foot cardinality notation
- PNG and SVG export
- No signup required
- Free forever plan
No SQL knowledge required — AI maps your entities automatically.