🚀 SchemaCode ER Diagram Generator

Free Online ERD Tool for SQL & DBML — Fast, Visual, Client-Side

Design, visualize, and export Entity Relationship Diagrams (ERDs) effortlessly using SchemaCode ER Diagram Generator. Convert SQL ↔ DBML, auto-align tables, customize themes, and export high-quality diagrams — all 100% client-side, fast, and free.

📘 Read Official Documentation →

🧭 What is SchemaCode ER Diagram Generator?

SchemaCode ER Diagram Generator is a developer-first online ERD tool that helps you transform database schemas into clean, readable, and shareable diagrams.

Whether you are:

• Designing a new database
• Reverse-engineering SQL schemas
• Documenting an existing system
• Teaching or learning database design

SchemaCode gives you speed, control, and clarity without server uploads or sign-ups.

🎯 Why Developers Choose SchemaCode

✅ Client-Side Only – Your schema never leaves your browser
✅ SQL ↔ DBML Converter – Switch seamlessly between formats
✅ Multiple Layout Algorithms – Instantly auto-align complex schemas
✅ Keyboard-First Workflow – Faster than drag-and-drop tools
✅ Export Diagrams – PNG / JPG for docs & presentations
✅ Multi-Tab & Workspace Support – Handle large projects easily

🔍 Core Features (SEO Optimized)

🔁 SQL ⇄ DBML Conversion

Have an existing SQL script?
Use the SQL → DBML converter to instantly generate an ER diagram.
Need SQL back? Export DBML → SQL in one click.

Perfect for migrations, refactoring, and documentation.

🧩 Smart ERD Layouts

Choose layouts that fit your schema size and complexity:

• Left → Right
• Force Directed
• Auto-Aligned Canvas

No more messy, overlapping tables.

🎨 Full Visual Customization

Make diagrams presentation-ready:

• Multiple table themes
• Custom background colors
• Grid patterns (dots, lines, etc.)
• Clean, modern canvas

🧠 Productivity-Boosting Keyboard Shortcuts

Speed matters.

Use shortcuts like:

• Ctrl + B – Toggle views
• Ctrl + S – Save tab
• Ctrl + Q – Quit tab

👉 View the full shortcuts list via the Help icon.

🗂️ Organize Large Schemas with Ease

• Multiple tabs
• Folder-based file organization
• Separate workspaces for different projects
• Table groups to cluster related entities

Ideal for microservices, monorepos, and enterprise schemas.

📤 Export & Share

Export your ER diagram as:

• PNG
• JPG

Perfect for:

• Documentation
• Architecture reviews
• Team discussions
• College assignments

🛠️ Quick Start Guide (How to Use)

🧪 Create Your First ER Diagram in 6 Steps

1. Paste your SQL or write DBML
2. Convert SQL → DBML (if needed)
3. Choose a layout algorithm
4. Customize themes & background
5. Drag, group, and filter tables
6. Export as PNG/JPG or SQL

💡 Tip: Use Fit to Screen to auto-center your diagram.

📌 Pro Tips for Better ERDs

• Use table groups for related domains
• Filter tables from the right sidebar
• Try Force Directed layout for complex schemas
• Use dark theme for long working sessions
• Keep one workspace per system or service

🏆 How SchemaCode Beats Other ERD Tools

❓ Frequently Asked Questions (FAQ)

What formats can I export?

You can export diagrams as PNG or JPG, and convert schemas back to SQL.

Is SchemaCode free?

Yes — completely free with no hidden limits.

Does it work offline?

Yes. Since everything runs client-side, it works even without an internet connection.

Can I use it for large databases?

Absolutely. Use filters, groups, layouts, and workspaces to manage large schemas efficiently.

🚀 Start Building Better ER Diagrams

Create clean, understandable, and professional ER diagrams — faster than ever.

👉 Try SchemaCode ER Diagram Generator now and visualize your database instantly.

Built for developers. Designed for clarity. Optimized for speed.