JavaScript to JSON Converter

Convert JavaScript objects and arrays to JSON format with proper indentation

Overview

Convert JavaScript objects and arrays to properly formatted JSON. This tool safely evaluates JavaScript code and outputs valid JSON with customizable indentation.

Key Benefits

  • Safe evaluation of JavaScript objects and arrays
  • Configurable output formatting
  • Preserves data types and structure
  • Handles nested objects and arrays
  • Support for common JavaScript object notations

Primary Use Cases

  • Converting JavaScript configuration objects to JSON
  • Preparing data structures for API requests
  • Debugging JavaScript objects
  • Data format migration

Features

Main Features

  • Safe JavaScript code evaluation
  • Customizable indentation
  • Support for nested structures
  • Proper type preservation
  • Error detection and validation

Technical Specifications

  • Handles JavaScript object literals
  • Supports arrays and nested objects
  • Preserves number types
  • Maintains string encoding
  • Validates JavaScript syntax

Examples

Simple Object

Converting a basic JavaScript object to JSON

Input:

const config = {
  name: "John Doe",
  age: 30,
  active: true
}

Output:

{
  "name": "John Doe",
  "age": 30,
  "active": true
}

Nested Arrays

Converting nested arrays and objects

Input:

const data = {
  users: [
    { id: 1, name: "Alice" },
    { id: 2, name: "Bob" }
  ],
  permissions: ["read", "write"]
}

Output:

{
  "users": [
    {
      "id": 1,
      "name": "Alice"
    },
    {
      "id": 2,
      "name": "Bob"
    }
  ],
  "permissions": [
    "read",
    "write"
  ]
}

Frequently Asked Questions

What JavaScript syntax is supported?

The converter supports standard JavaScript object and array literals. It can handle nested structures, basic data types (strings, numbers, booleans, null), and arrays.

Is the conversion secure?

Yes, the tool uses secure evaluation methods to prevent arbitrary code execution. It only processes valid JavaScript object and array literals.

What happens if the input is invalid?

The tool will display a clear error message indicating the syntax error or validation issue in your JavaScript code.

Tips & Best Practices

Best Practices

  • Use proper JavaScript object literal syntax
  • Ensure all property names are valid
  • Use quotes for property names when needed
  • Properly close all brackets and braces
  • Format input code for better readability

Common Pitfalls

  • Using function declarations or expressions
  • Including JavaScript operators or expressions
  • Using undefined values (not supported in JSON)
  • Forgetting to close brackets or braces
  • Using invalid property names