🚀 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 viewsCtrl + S– Save tabCtrl + 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
- Paste your SQL or write DBML
- Convert SQL → DBML (if needed)
- Choose a layout algorithm
- Customize themes & background
- Drag, group, and filter tables
- 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
| Feature | SchemaCode | Typical ERD Tools |
|---|---|---|
| Client-side only | ✅ | ❌ |
| SQL ↔ DBML | ✅ | ❌ |
| Keyboard shortcuts | ✅ | ❌ |
| Multi-workspace | ✅ | ❌ |
| No signup | ✅ | ❌ |
| Developer-focused | ✅ | ❌ |
❓ 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.