Nodezilla

A simple and flexible tool to visualize graphs either from a JSON file or by generating random graphs.

Features

• Load and display graphs from a .json file
• Generate random graphs with configurable options
• Customizable node positions, labels, and colors
• Global graph settings for consistent styling
• Automatic override of individual node/edge colors when a global color is specified

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JSON Graph Format

To load a graph from a JSON file, use the following format:

"graph3": {
  "global_settings": { "name": "Triangle", "color": "blue" },
  "nodes": [
    { "pos": [0, 3], "id": 1, "label": "A", "color": "blue" },
    { "pos": [-2.5, -2], "id": 2, "label": "B" },
    { "pos": [2.5, -2], "id": 3, "label": "C" }
  ],
  "edges": [
    { "source": 1, "target": 2 },
    { "source": 2, "target": 3 },
    { "source": 3, "target": 1 }
  ]
}

Field Details

global_settings (optional)

• name: A string representing the graph name (for UI or labeling purposes)
• color: A string specifying a color that overrides all individual node and edge colors

nodes

• id: Unique integer identifier for the node
• label: (Optional) A string label for the node
• color: (Optional) Color of the individual node (overridden if a global color is set)
• pos: A list of two numbers [x, y] representing the position of the node. Both integers and floats are supported, including mixed types.

edges

• source: ID of the source node
• target: ID of the target node

Note: If a color is provided in global_settings, it will override all individual color values for nodes and edges.

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Random Graph Generation

You can also generate random graphs with parameters like:

• Number of nodes
• Edge density
• Optional random labels or colors