JSON Size Explorer

Analyze JSON Byte Size

Use this tool to visually inspect how much space each field in your JSON object takes. Whether you’re optimizing API responses or debugging large data sets, ToolMateX's JSON Size Explorer gives you a clear breakdown of each key's contribution to the total payload.

Key Features

• Live JSON parsing with error feedback
• Key paths displayed in dot notation
• Size in bytes calculated using Blob
• Value previews for each node
• Fully in-browser, privacy-first processing

Use Cases

• 📦 Optimize API payload size for mobile or low-bandwidth clients
• 🔍 Debug deeply nested or verbose JSON objects
• 🧹 Identify redundant or heavy fields for cleanup
• 📊 Visualize the byte impact of each property

How It Works

Paste any JSON object into the input box and it will instantly parse and display a list of all keys, their data types, estimated size in bytes, and a short preview of the value.

Example JSON Input

{
  "user": "Zonayed",
  "meta": {
    "age": 30,
    "skills": ["JavaScript", "React", "Node"]
  },
  "active": true
}