Does formatting change the JSON data?
No. Formatting only changes whitespace and indentation. All keys, values, arrays, and objects remain exactly the same.
JSON Formatter converts compact, minified, or hard-to-read JSON into clean, indented output with one click. Developers use it to inspect REST API responses, debug frontend applications, and read configuration files from tools like package.json, tsconfig.json, and AWS CloudFormation. Paste your JSON and get instantly readable, indented output — all in your browser, never uploaded to any server.
The formatter parses the JSON using the browser's native JSON.parse() and then serializes it back with JSON.stringify(data, null, 2) to produce clean 2-space indented output. This guarantees the output is always valid JSON that is semantically identical to the original compact input.
No. Formatting only changes whitespace and indentation. All keys, values, arrays, and objects remain exactly the same.
A formatter makes valid JSON readable by adding indentation. A validator checks whether JSON is syntactically correct. If your JSON is invalid, use the JSON Validator tool first.
Yes. The formatter handles any depth of nesting, arrays within objects, objects within arrays, and all standard JSON data types.
No. Formatting happens entirely in your browser using JSON.parse() and JSON.stringify(). Your data never leaves your device.
No. The formatter requires valid JSON. If your JSON has errors (missing commas, trailing commas, unquoted keys), use the JSON Validator tool to identify and fix the issues first.
Yes, completely free. No account, no install, no limits on the JSON size.
Tool workspace
Free JSON formatter and beautifier — instantly pretty-print minified JSON with indentation. Format API responses, config files, and raw JSON data. No upload, 100% private.
Output
Input
{"name":"John","age":30,"city":"New York"}Output
{
"name": "John",
"age": 30,
"city": "New York"
}