JSON Formatter & Validator

Paste JSON to format, validate, view as a tree outline, download, beautify, or minify it directly in your browser. The tool is useful for API responses, configuration files, logs, and test payloads that need quick cleanup.

How to use this JSON formatter

  1. Paste JSON into the input box.
  2. Format JSON for readable indentation.
  3. Validate JSON to catch syntax errors.
  4. Use Tree View to inspect object and array structure.
  5. Download or copy the output when finished.

Common JSON errors

Missing commas, trailing commas, single quotes, unquoted keys, and mismatched braces are common reasons JSON will not parse.

JSON formatter vs minifier

Formatting adds indentation and line breaks for reading. Minifying removes unnecessary whitespace from valid JSON.

Example formatted JSON

{
  "tool": "JSON Formatter",
  "features": ["format", "validate", "minify"],
  "privacy": "browser-only"
}

Private browser-based formatting

Your JSON is processed locally in the browser. There is no backend and no analytics tied to your JSON. Ads are served through AdSense and may show a consent prompt.