Visualize JSON as Diagrams
Turn complex JSON structures into visual diagrams using Mermaid, Flow Diagrams, and Node Graphs.
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Understanding complex JSON structures is much easier with visual representations. DataLensia offers three different visualization approaches, each suited to different use cases.
🚩 The Problem
You receive a deeply nested API response with 500+ fields and need to:
- Understand the overall structure quickly.
- Document it for your team.
- Find relationships between entities.
🛠️ Option 1: Mermaid Diagrams (Best for Documentation)
The JSON to Mermaid tool converts your JSON into 10 different diagram types:
| Diagram Type | Best For |
|---|---|
| Flowchart | Hierarchical structure overview |
| Class Diagram | Object properties and types |
| Mind Map | Exploring nested hierarchies |
| ER Diagram | Relationships between entities |
| Sequence Diagram | Interaction flows |
| Pie Chart | Numeric distributions |
| Timeline | Chronological events |
| State Diagram | State machines and transitions |
| Gantt Chart | Project schedules |
| User Journey | UX flows and scores |
Steps:
- Open the Mermaid Visualizer.
- Paste your JSON.
- Select the diagram type from the top selector.
- Configure direction (Top-Down, Left-Right, etc.) and depth limits.
- Export as SVG or PNG for documentation.
🛠️ Option 2: Flow Diagram (Best for Exploration)
The JSON Flow Diagram uses React Flow to create an interactive, zoomable node graph:
Steps:
- Open the Flow Diagram Tool.
- Load your JSON.
- Use the MiniMap to navigate large structures.
- Search for specific keys or values.
- Click on nodes to expand/collapse branches.
- Export the diagram as SVG.
Key features:
- Zoom and pan with mouse/trackpad.
- Color-coded nodes by data type (string, number, boolean, object, array).
- Fullscreen mode for presentations.
- Search highlighting across all nodes.
🛠️ Option 3: Node Graph (Best for Relationships)
The Node Graph (available in the workspace Visualize panel) shows your JSON as a force-directed graph:
Steps:
- Open a workspace from the Editor.
- Navigate to the Visualize section.
- Select the Node Graph visualization.
- Interact with nodes — drag, zoom, filter by type.
- Download as PNG.
💡 When to Use Which
| Need | Recommended Tool |
|---|---|
| Documentation / README | Mermaid (SVG export) |
| Exploring unknown APIs | Flow Diagram |
| Presenting to stakeholders | Mermaid (Mind Map or Flowchart) |
| Understanding relationships | Node Graph |
| Debugging nested data | Flow Diagram (with search) |
🚀 Try it now
Paste your JSON into the Mermaid Visualizer or the Flow Diagram to see it come to life.