String to JSON Converter — Online JSON Parse & Format Tool

"String to JSON" means parsing a text string that contains JSON syntax into an actual JSON object you can work with. Whether you need to parse a raw API response string, decode a minified JSON payload, or convert a JavaScript object back to JSON — here are the best free methods.

Method 1: Online JSON Formatter (No Code Needed)

If you have a raw JSON string and want to see it as a formatted, readable object:

1. Open TextWonder's JSON Formatter.
2. Paste your JSON string into the input box.
3. Click Format. The tool parses the string and outputs a beautifully indented JSON object.
4. If the string is invalid JSON, the tool highlights the syntax error.

Method 2: JSON.parse() in JavaScript

In JavaScript, convert a JSON string to an object with:

const jsonString = '{"name":"Alice","age":30}';
const obj = JSON.parse(jsonString);
console.log(obj.name); // "Alice"

Always wrap JSON.parse() in a try/catch to handle invalid strings:

try {
  const obj = JSON.parse(jsonString);
  // use obj here
} catch (e) {
  console.error('Invalid JSON:', e.message);
}

Method 3: Object to JSON String (JSON.stringify)

To convert a JavaScript object to a JSON string:

const obj = { name: "Alice", age: 30 };
const jsonString = JSON.stringify(obj, null, 2);
// Result: '{\n  "name": "Alice",\n  "age": 30\n}'

null, 2 adds 2-space indentation. Use null, 0 (or just JSON.stringify(obj)) for compact/minified output.

Method 4: Python — json.loads() and json.dumps()

In Python:

import json

# String → Python dict (equivalent to JSON object)
data = json.loads('{"name": "Alice", "age": 30}')
print(data["name"])  # Alice

# Python dict → JSON string
json_string = json.dumps(data, indent=2)
print(json_string)

Why Is My JSON String Invalid?

Common reasons JSON.parse() fails:

• Single quotes: JSON requires double quotes — 'name' is invalid, "name" is correct.
• Trailing commas: [1, 2, 3,] is invalid JSON (trailing comma after last item).
• Unquoted keys: {name: "Alice"} is invalid — keys must be quoted: {"name": "Alice"}.
• Double-escaped backslashes: Strings received from APIs may be double-encoded. Use the JSON Formatter to spot the issue.