JSON Formatter, Validator & Beautifier

Format, validate, beautify, and minify JSON instantly. Syntax highlighting, error detection, and path copying. 100% client-side.

Free Always No Account Needed 100% Client-Side

Indent:

Sort keys

Input JSON

73 bytes

Output Valid

{
  "name": "John",
  "age": 30,
  "city": "New York",
  "hobbies": [
    "reading",
    "coding"
  ]
}

How to use JSON Formatter, Validator & Beautifier Online

1
Input Data or ParametersPaste your input string, code payload, or select parameters into the editor.
2
Instant Local ComputationThe tool processes your request in real-time inside your browser using client-side JavaScript.
3
Copy or Export OutputCopy the formatted result to your clipboard or download the output payload instantly.

About this tool

JSON (JavaScript Object Notation) is the most common data interchange format in modern web APIs. Poorly formatted or invalid JSON is one of the most common sources of bugs and confusion.

This tool formats raw JSON into properly indented, human-readable output with syntax highlighting. It validates your JSON and points to the exact line and character of any syntax error. You can also minify JSON to remove all whitespace for production use.

Features: - Format/Beautify — indent with 2 or 4 spaces, or tabs - Minify — strip all whitespace to minimize payload size - Validate — instant error detection with line/column pointer - Sort keys — alphabetically sort object keys for consistency - Copy path — click any value to copy its JSONPath

Works with JSON objects, arrays, nested structures, and handles all valid JSON data types.

Frequently Asked Questions

What's the difference between JSON and JavaScript objects?

JSON requires double quotes on keys, no trailing commas, and no functions. JavaScript objects are more permissive.

What causes 'Unexpected token' JSON errors?

Usually trailing commas, single quotes instead of double quotes, unquoted keys, or JavaScript-style comments.

How do I minify JSON?

Use the Minify button. This removes all whitespace and newlines, reducing payload size by 20-40% for typical JSON.

What is JSONPath?

JSONPath is a query language for JSON, similar to XPath for XML. Example: $.users[0].name selects the name of the first user.

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