What Is a JSON Formatter?

Direct Answer

A JSON formatter takes valid JSON and makes it easier to read by adding indentation, line breaks, and consistent spacing. It should not change the data itself.

When to Use One

Use a formatter when JSON is compressed into one line, when you need to inspect an API response, or when a configuration value is hard to scan.

• Debug API responses
• Review configuration files
• Prepare examples for documentation

Example

A formatter turns compact JSON into a structured block.

{"name":"Ada","active":true}

becomes

{
  "name": "Ada",
  "active": true
}