JSON Formatter

Beautify, minify, and validate JSON in the browser.

{
  "hello": "world",
  "n": [
    1,
    2,
    3
  ]
}

Calculated Result

Valid JSON

Formula: JSON.parse → JSON.stringify

About this calculator

Paste an API payload or config. Pretty mode uses two-space indent. Minify drops whitespace. Invalid JSON shows the parser error.

FormulaJSON.parse then JSON.stringify(value, null, indent)

JSON.parse reads the text. JSON.stringify writes it back with or without indent.

No. JSON.parse runs in this tab. You only see the browser’s error message.

Yes. Pretty uses two-space indent. Minify is JSON.stringify without whitespace.

Break a query onto keyword lines.

Pretty-print XML tags in the browser.

Convert CSV tables to JSON objects and back.

Decode a JSON Web Token header and payload locally.