JSON to JavaScript Object Converter
Convert JSON into properly formatted JavaScript object notation instantly. Our free tool is ideal for developers embedding JSON data directly into JavaScript or Node.js code.
Using This Tool
You have JSON data that needs to be a JavaScript object in your code. Copy-pasting JSON directly doesn't work because of quote differences and the need for proper variable declarations. You want a const declaration with the data ready to use.
Output Options:
- •
constdeclarations - •
letorvar - • ES6 module exports
- • CommonJS exports
Customization:
- • Single or double quotes
- • Trailing commas (ES6+)
- • Custom variable names
- • Indentation style
How the Conversion Works
About JSON to JavaScript Converter
JSON is almost valid JavaScript but not quite. This converter transforms JSON into proper JavaScript object notation with your choice of quote style and optional trailing commas. The output is a complete const declaration ready to paste into your code.
How the conversion works
Paste your JSON in the input panel. Choose single or double quotes for strings. Optionally enable trailing commas for ES6+ code. Click Convert to JS and the tool parses your JSON then rebuilds it as a JavaScript object with a const declaration.
The output preserves your data structure with proper JavaScript syntax. Arrays and nested objects are formatted with readable indentation. Use Copy to grab the code or Download to save as a .js file.
When you'd use this
You have JSON data that needs to become a JavaScript constant in your module. Or you're creating test fixtures and want to avoid manual conversion errors. This tool also helps when embedding API responses directly into frontend code for demos.
This converter handles syntax only. It doesn't create JavaScript classes or add type annotations. For TypeScript interfaces or class definitions, use our JSON to TypeScript tool instead.
Questions
What's the difference between JSON and JavaScript objects?
JSON requires double quotes and doesn't allow trailing commas. JavaScript objects can use single quotes, allow trailing commas in ES6+, and support more value types.
Can I use single quotes in the output?
Yes, use the Quote Style dropdown to choose single or double quotes. Single quotes are common in JavaScript codebases.
What are trailing commas?
Trailing commas are commas after the last item in an array or object. They're valid in ES6+ and make git diffs cleaner when adding items.
Does this handle functions or undefined?
No, JSON doesn't support functions or undefined. Those values can't be represented in JSON and won't appear in the output.
Can I change the variable name?
The variable name is currently set to "data". Edit the output manually to use your preferred name, or request this feature for future updates.