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Free JSON Formatter, Minifier & Validator Tool Online

Free online JSON formatter, minifier, and validator. Quickly beautify, compress, and check JSON code for errors. Fast, secure, and easy to use.
Suptojit Modak
Free JSON Formatter, Minifier & Validator Tool Online
Table of Contents

What Is JSON?

JSON (pronounced as Jason) stands for "JavaScript Object Notation." It is a human-readable and compact way to represent a complex data structure and enable data exchange between systems. This format is common and has a wide range of uses because of its simplicity and resemblance to readable text. Most systems use it for communicating data.

Why Use JSON?

There are several reasons to consider using JSON. The main reason is that JSON works independently of your system's programming language, even though it comes from JavaScript. JSON is not tied to any specific language, and it represents data that includes common elements from many programming languages, making it a universal data representation understood by all systems.

  • Readability: JSON is easy for humans to read when formatted correctly.
  • Compactness: The JSON format does not require a full markup structure like XML.
  • It is easy to break down into logical parts, especially in JavaScript.
  • There are many JSON libraries available for most programming languages.

Proper JSON Format

You don't need to know JavaScript to use JSON, but having some knowledge can help you understand it better. While JavaScript skills aren't necessary, following certain rules is essential:

  • Data is in name/value pairs.
  • Data items are separated by commas.
  • Objects are enclosed in opening and closing curly brackets.
  • An empty object can be represented by {}.
  • Arrays are enclosed in opening and closing square brackets.
  • An empty array can be represented by [].
  • A member is represented by a key-value pair in double quotes.
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  • Each member should have a unique key within an object structure.
  • The value of a member must be in double quotes if it's a string.
  • Boolean values are written as true or false in lowercase.
  • Number values use double-precision floating-point format and should not have leading zeros.
  • Special characters in a string must be escaped with a backslash (\).
  • Null values are represented by the null literal in lowercase.
  • Dates and similar object types aren't well supported and should be converted to strings.
  • Each member of an object or array must be followed by a comma, except for the last one.
  • The standard file extension for JSON is '.json'.
  • The MIME type for JSON files is 'application/json'.

You can achieve proper JSON formatting by following these simple rules. If you're unsure about your code, we recommend using the JSONLint Validator and formatter.

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