JSON Formatter Online

What Is a JSON Formatter?

A JSON formatter converts raw JSON into structured, readable output with proper indentation. It is often used together with JSON validation to quickly spot syntax errors and inspect nested data from APIs, logs, and configuration files.

Minification is the reverse process: it removes extra spaces and line breaks to produce compact JSON that is easier to transmit in requests and storage.

Example JSON Structure

{
  "user": {
    "id": 123,
    "name": "Tom",
    "role": "admin"
  },
  "permissions": ["read", "write"],
  "meta": {
    "source": "api",
    "timestamp": 1768803600
  }
}

• user: nested object with identity fields.
• permissions: array structure for authorization logic.
• meta.timestamp: Unix time that can be converted to readable date.

Common Mistakes

• Trailing comma after the last key-value pair.
• Using single quotes instead of double quotes.
• Missing quotes around object keys.
• Accidentally mixing comments into JSON content.

Recommended Debug Flow

1. Paste JSON response or request body into this formatter.
2. Fix syntax errors until validation passes.
3. Switch to minify before storing or sending payload.
4. If JSON contains encoded text, decode with Base64 Encode Decode.
5. If it contains token claims or timestamps, use JWT Decoder and Unix Timestamp Converter.
6. If you need payload integrity checks, generate digest in Hash Generator.

Related Tools

• Base64 Encode Decode
• URL Encode Decode
• JWT Decoder
• Unix Timestamp Converter
• UUID Generator
• Hash Generator