JSON to Javascript Object Converter

JSON to JavaScript converter helps you convert JSON data into a JavaScript object or variable that can be used directly in your code. This free online tool is useful for developers who want to transform JSON responses into readable and reusable JavaScript syntax. Paste your JSON, and the tool will instantly generate valid JavaScript output.

Input JSON

JS Output

1 How to use this tool

Paste your JSON data into the Input JSON editor on the left.
Or use the Upload JSON button to load a file from your computer.
You can also click Load URL to fetch JSON from an external endpoint.
The tool will automatically convert your JSON into a JavaScript object variable.
Click Copy Result to copy the generated code to your clipboard.

2 Example

Input JSON

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[
    {
        "id": 1,
        "name": "John Doe",
        "email": "[email protected]",
        "roles": [
            "admin",
            "editor"
        ],
        "active": true
    },
    {
        "id": 2,
        "name": "Jane Smith",
        "email": "[email protected]",
        "roles": [
            "user"
        ],
        "active": false
    }
]

JS Output

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const users = [
    {
        id: 1,
        name: 'John Doe',
        email: '[email protected]',
        roles: [
            'admin',
            'editor'
        ],
        active: true
    },
    {
        id: 2,
        name: 'Jane Smith',
        email: '[email protected]',
        roles: [
            'user'
        ],
        active: false
    }
];

3 Benefits of using this tool

Frontend Development

Quickly transform API responses into initial state variables for React, Vue, or Svelte components.

Node.js Configuration

Convert JSON configuration files into standard CommonJS or ES modules.

Mock Data Generation

Create mock objects for unit tests without manually reformatting keys and values.

Syntax Validation

Ensure your data structure is valid JavaScript syntax, compatible with older browsers if needed.

4 Privacy and Security

This tool operates entirely in your browser. Your data is processed locally using JavaScript and is never sent to any external server. You can safely use this tool with sensitive configuration data or internal API responses without worrying about data leaks.

5 Common Errors

SyntaxError: Unexpected token
This usually means your input JSON is malformed. Check for missing quotes around keys, trailing commas, or unclosed brackets.
Invalid Key Names
If your JSON keys contain spaces or special characters (e.g., "user-name"), the converter will wrap them in quotes to ensure valid JavaScript syntax.

6 FAQ

Can this convert functions?

No, JSON is a data format and cannot store functions. This tool converts valid JSON data structures into JavaScript objects/arrays.

Is the output ES6 compatible?

Yes, the generated code uses standard object literal notation which is compatible with all versions of JavaScript, including ES6+.

Related Tools

Need PHP arrays instead? Try our JSON to PHP converter.

Working with data for spreadsheets? Use the JSON to CSV tool.

To format and validate your JSON data, check out the JSON Formatter.