JSON Formatter & Validator

Format, validate, and beautify your JSON data.

JSON Formatter: Validate, Beautify & Debug JSON

Working with APIs or configuration files? Our **JSON Formatter** is the ultimate tool for developers to validate and beautify JSON data. Convert compacted, unreadable JSON strings into a structured, indented format that is easy to read and debug.

Instant Validation

Automatically checks your JSON for syntax errors. If there's a missing comma or bracket, we'll tell you exactly where.

Perfect Indentation

Beautify your JSON with standard 4-space indentation, making nested objects and arrays easy to navigate.

Minify Option

Need to save space? Toggle to "Minify" mode to remove all whitespace and generate a compact JSON string for production.

What is JSON?

JSON (JavaScript Object Notation) is a lightweight data-interchange format. It is easy for humans to read and write, and easy for machines to parse and generate. It is widely used in REST APIs, configuration files (like `package.json`), and database storage (NoSQL).

However, raw JSON from an API usually comes in a single line to save bandwidth. This makes debugging a nightmare.

Example of Raw JSON:
`{"name":"John","age":30,"cars":["Ford","BMW","Fiat"]}`

Formatted JSON:

{
    "name": "John",
    "age": 30,
    "cars": [
        "Ford",
        "BMW",
        "Fiat"
    ]
}

Common JSON Errors We Fix

  • Trailing Commas: JSON standards do not allow a comma after the last item in an array or object.
  • Single Quotes: JSON keys and string values must be wrapped in double quotes (`"`), not single quotes (`'`).
  • Unescaped Characters: Special characters like newlines inside strings must be properly escaped.

Frequently Asked Questions (FAQ)

Is my data safe?
Absolutely. This tool runs 100% in your browser using JavaScript. We do not store or transmit your JSON data to any server.
Why does it say "Invalid JSON"?
This means your input violates strict JSON syntax. Common culprits include using single quotes instead of double quotes, missing quotes around keys, or having trailing commas. The error message will usually give you a hint.
Can I convert XML to JSON here?
No, this tool expects valid JSON input. If you need to convert XML, please use our specialized **XML to JSON Converter** tool.