JSON Formatter Online

⭐ JSON Formatter Online: Format, Validate, and Minify JSON

The JSON Formatter turns compact or inconsistently spaced JSON into readable, consistently indented text. It also minifies JSON for compact output, validates syntax, and can sort object keys. Unlike a JSON viewer, this tool produces clean JSON text that you can copy, save, or use in another application.

⭐ What Does This JSON Formatter Do?

• Beautifies valid JSON with two spaces, four spaces, or tab indentation.
• Minifies JSON by removing unnecessary whitespace.
• Validates JSON and reports a useful line and column when the browser provides an error position.
• Optionally sorts object keys, including keys in nested objects.
• Counts JSON values, reports the maximum nesting depth, and shows input and output sizes.
• Opens a JSON file or accepts a file dropped onto the input.
• Copies the result or downloads it as a .json file.

⚙️ How to Format or Minify JSON

1. Paste JSON into the input box, drag a .json file onto it, or select a file.
2. Choose an indentation style and optionally enable Sort object keys.
3. Select Format JSON for readable output or Minify JSON to remove whitespace.
4. Copy the result or download it as a JSON file.

Use Ctrl + Enter to format, or Ctrl + Shift + Enter to minify. On Mac, use the Command key instead of Ctrl.

🔎 Example: Beautify Compact JSON

Before:

{"user":{"name":"Ada","active":true},"scores":[98,87,92]}

After formatting with two spaces:

{
  "user": {
    "name": "Ada",
    "active": true
  },
  "scores": [
    98,
    87,
    92
  ]
}

⚙️ Key Sorting and JSON Output

Enable Sort object keys to sort keys alphabetically in every object, including nested objects. Arrays keep their original order. Sorting changes the order of object properties in the output, so leave the option off when you need to preserve the input order.

Formatting changes whitespace, not the underlying JSON values. Minified output keeps the same data while removing spaces and line breaks that are not needed by JSON.

⚠️ Fixing Invalid JSON

JSON requires double quotes around property names and string values. Check for missing commas, unmatched braces or brackets, comments, and trailing commas. Standard JSON does not allow comments or trailing commas. The formatter only produces output after the input parses as valid JSON.

⭐ Private, Browser-Based JSON Formatting

JSON formatting, validation, sorting, and minification happen locally in your browser. The JSON Formatter does not upload or store your input. Files up to 50 MB can be opened in the tool; very large or deeply nested documents may use significant browser memory.

This tool is also known as

• format json online
• json beautifier with indentation
• minify json online
• json key sorter
• pretty print json online