JSON2Mermaid Lite｜Usage Guide

1. Purpose

JSON2Mermaid Lite automatically converts JSON structures into Mermaid.js flowchart TD syntax.

Simply paste your JSON and the tool will generate a diagram-friendly representation that you can directly use in Mermaid Live Editor.

2. How to Use

• ① Paste your JSON into the input area.
• ② Click the “Convert” button.
• ③ Mermaid syntax will be generated below.
• ④ Use the “Copy” button to save it to clipboard.
• ⑤ Paste it into Mermaid Live Editor to visualize the structure.

3. Supported / Unsupported

Supported:

• Objects (including nested structures)
• Arrays (index values used as node labels)
• Primitive values (string / number / boolean)

Unsupported:

• Circular references
• Special object types (Date, Function, Symbol, etc.)
• Extremely large JSON (browser-dependent)

4. Error Handling

If your JSON contains syntax errors, an “Invalid JSON format” message will appear.

Very large JSON structures may take some time to process.

5. Output Format

Output is Mermaid.js flowchart TD syntax.

flowchart TD
  node_0["root"]
  node_1["user"]
  node_0 --> node_1
  node_2["name"]
  node_1 --> node_2

6. FAQ

Q. Is my data sent anywhere?

A. Everything is processed locally and never uploaded.

Q. Where can I use the Mermaid syntax?

A. Mermaid Live Editor and documentation tools.

Q. What happens with very large JSON?

A. It may take longer to convert depending on your device.

7. Disclaimer

Accuracy of converted diagrams is not guaranteed. Always verify critical structures manually.