JSON Formatter & Validator

A JSON formatter (also called a JSON beautifier or JSON pretty printer) takes raw, compact, or unformatted JSON and restructures it with proper indentation and line breaks so it becomes easy to read and understand. Whether you are debugging an API response, reviewing a config file, or inspecting data from a third-party service, a formatted JSON view saves significant time.

This tool also acts as a JSON validator. It detects syntax errors and reports useful line or position details when the browser parser provides them.

1. Paste your JSON into the Input JSON editor.
2. Choose Format, Minify, or Validate — or click Compare to diff it in our Text Compare tool.
3. Copy or download the formatted output when you are done.

• 100% free - no account, no limits, no paywall.
• Private - all processing runs in your browser. Your JSON never leaves your device.
• Fast - instant results, even for large payloads.
• Flexible input - paste text, upload a .json file, or load directly from a URL.
• Multiple output modes - beautify with 2 or 4 space indent, or minify to a single line.
• Sort keys - alphabetically reorder all object keys at every level for easier comparison.