Does it support trailing commas?

Yes, trailing commas before } or ] are automatically removed.

What about single-quoted strings?

Single-quoted strings are converted to properly escaped double-quoted JSON strings.

Can it handle functions or non-JSON values?

No, the input must be a plain data literal — functions, undefined, and symbols aren't valid JSON.

JavaScript Object to JSON

Convert a JS object literal into strict, valid JSON.

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JavaScript object literal

Strict JSON

{
  "name": "Ada Lovelace",
  "age": 28,
  "skills": [
    "math",
    "logic"
  ],
  "active": true
}

About the JavaScript Object to JSON

Paste a JavaScript object or array literal — with unquoted keys, single quotes, comments, or trailing commas — and convert it into strict, standards-compliant JSON.

Examples

Unquoted keys

{ name: 'Ada', age: 28 }

Output

{"name":"Ada","age":28}

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Frequently asked questions

Version 1.0.0 · Updated 2026-08-06 · Runs entirely in your browser