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JSON Prettier & Validator

Validate and format your JSON data. Make it readable or compress it to save space.

What is JSON?

JSON (JavaScript Object Notation) is a lightweight data-interchange format. It's easy for humans to read and write and easy for machines to parse and generate. Although based on JavaScript object notation, JSON is a language-independent text format used by many programming languages.

JSON is widely used for web APIs, configuration files, data storage, and more, offering advantages over XML due to its simplicity and lightweight structure. It's the standard format for most REST APIs, database communications, and configuration files across the web.

Why Use a JSON Formatter?

  • Beautify complex JSON data for better readability
  • Identify syntax errors and pinpoint their exact location
  • Convert minified JSON into a human-readable format
  • Compress JSON to reduce data transfer size
  • Test and debug API responses effectively
  • Quickly understand the structure of complex JSON objects
  • Evaluate JSON data too complex to review in browser dev tools

Basic Rules of JSON Format

  • Data is in name/value pairs
  • Data is separated by commas
  • Objects are encapsulated within curly braces {}
  • Arrays are encapsulated within square brackets []
  • Strings must be enclosed in double quotes ("")
  • Numbers are represented as-is, and boolean values as true or false
  • Null values are represented as null

Example:

{
  "person": {
    "name": "John Doe",
    "age": 30,
    "isEmployed": true,
    "address": {
      "city": "New York",
      "street": "Broadway",
      "zipCode": "10001"
    },
    "hobbies": ["reading", "travel", "programming"],
    "contact": null
  }
}

Common JSON Errors

  • Extra comma at the end of collections or arrays (e.g., {"a": "b", })
  • Not enclosing property names in quotes (e.g., {name: "value"})
  • Using single quotes instead of double quotes
  • Including leading zeros in numbers (e.g., 01, 02)
  • Mismatched curly braces or square brackets
  • Including comments in JSON (JSON doesn't support comments)
  • Using equals sign (=) instead of colon (:) between key and value

These errors can be easily identified and fixed using this tool. When an error is present, the tool will show the exact line and position of the error.

Keywords

JSON formatter, JSON validator, JSON linter, JSON parser, JSON beautifier, JSON minifier, JSON pretty print, JSON syntax checker, JSON viewer, JSON error detector, JSON lint online