No — formatting happens in your browser. Paste a production payload without a second thought.

What if the JSON is invalid?

It tells you the parse error. If you only want to check validity, use the JSON Validator, which never throws.

formatters · free tool

JSON Formatter

Pretty-print and indent JSON — in your browser, nothing uploaded.

Runs in your browser — your data never leaves it

Input

Paste, type, or drop a file. Runs as you type.

Output

Output appears here as you type.

Input

{"a":1,"b":[2,3]}

Output

{
  "a": 1,
  "b": [
    2,
    3
  ]
}

This example is one of JSON Formatter's test cases — if the tool stopped producing this output, the build would fail.

Is my data uploaded?: No — formatting happens in your browser. Paste a production payload without a second thought.
What if the JSON is invalid?: It tells you the parse error. If you only want to check validity, use the JSON Validator, which never throws.

Check whether JSON is valid and see the first error.

Turn a JSON array of records into CSV, with proper escaping.

Strip whitespace from JSON down to the smallest valid form.

Convert JSON into XML, with sensible element names and nesting.