Flowchart Diagram

Create flowcharts and diagrams instantly. Support for flowchart, sequence, class, state, ER diagrams. Free online diagram tool.

Mermaid Code

Preview

Settings

Theme

Templates

Supported Diagram Types

Flowchart

graph TD

Sequence Diagram

sequenceDiagram

Class Diagram

classDiagram

State Diagram

stateDiagram-v2

ER Diagram

erDiagram

Gantt Chart

gantt

Learn more about official documentation

Frequently Asked Questions

Quick answers to common questions

What types of diagrams can I create?

You can create flowcharts, sequence diagrams, organizational charts, mind maps, and more. The tool provides various shapes and connection styles for different diagram types.

How do I connect shapes in a flowchart?

Simply drag from one shape to another to create a connection. The tool automatically creates appropriate arrows with labels. You can also customize connection styles (orthogonal, curved, or straight).

Can I collaborate on diagrams?

Yes! You can share diagrams via a shareable link. Others can view and edit the diagram in real-time. All changes are synced instantly.

Can I export my diagrams?

Yes! You can export diagrams as PNG, JPG, or SVG files. You can also save them as JSON for later editing or import into other diagramming tools.

Is my diagram data private?

Absolutely. All diagram creation happens locally in your browser. Your diagram data is never sent to any server unless you choose to share it.

View Complete Guide & Tutorials

Explore advanced techniques and best practices

Use Cases

Discover how to integrate this tool into your workflow

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Process Documentation

Document workflows and standard operating procedures.

Business processes
IT workflows
Decision trees
Training materials

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Software Architecture

Design system and data flow diagrams.

System architecture
Data flow diagrams
API interactions
Database schemas

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Project Planning

Map out project steps and dependencies.

Project roadmaps
Task dependencies
Decision flows
Sprint planning

About This Tool

Flowcharts and diagrams are great for documenting processes, but drawing them in tools like Visio is tedious. This tool lets you create diagrams using text—just type the node connections, and it generates the diagram automatically. Uses Mermaid syntax, which is way simpler than dragging shapes around. Perfect for quick documentation or explaining a process to a teammate.

Technical Details

Uses Mermaid.js for diagram rendering. Supports flowcharts, sequence diagrams, class diagrams, state diagrams, and more. Write text-based syntax, get visual diagram. Edit the text, diagram updates in real-time. Export as SVG or PNG. Includes common shapes (rectangles, diamonds for decisions, cylinders for databases) and arrows.

Algorithm

Text parsing: reads Mermaid syntax, identifies nodes and connections. Graph layout: automatic positioning using algorithms like hierarchical layout (for flowcharts) or force-directed (for some diagrams). Rendering: draws shapes and text on canvas/SVG. Syntax examples: graph TD; A-->B; B-->C; creates a flowchart with nodes A, B, C and arrows between them.

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Privacy Commitment

🔒 **Privacy First**: Unlike server-based tools, AI-TOL processes everything locally in your browser - your data never leaves your device. No uploads, no tracking, completely private.