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About Best JSON Formatter Online Tool

  • JSON Formatter and Minifier is a free online developer tool to beautifully the format JSON data with your preferred indentation level or minify JSON data to be compact.

  • This tool is split into two modes: JSON Formatter and JSON Minifier.

  • You can either browse a JSON file locally, fetch JSON data from an URL, or enter JSON data manually.

  • When you're done formatting or minifying JSON data, you can either copy the result to your clipboard using the copy to clipboard button or download it as a text file to your device using the download button.

JSON Formatter

Beautifully formats messed up JSON data to be more human-friendly and readable with your preferred indentation level whether it be space or tab. The properly formatted JSON data will be displayed accordingly.

JSON Minifier

Minifies JSON data by removing all the unnecessary characters, such as white spaces, tabs, new lines, from the JSON data. The minified JSON data will be displayed accordingly.

What is JSON?

JSON (JavaScript Object Notation) is an open and lightweight format that uses human-readable text to structure, store, and transmit data over a network. The MIME type for JSON is application/json. JSON files use the .json filename extension.


There are several reasons why you should consider using JSON, the key reason being that JSON is independent of your system's programming language, despite being derived from JavaScript. Other reasons include:

  • Readability – JSON is human-readable, given proper formatting.

  • It's easy to analyze into logical syntactic components, especially in JavaScript.

  • Countless JSON libraries are available for most programming languages.

Online JSON Formatter Example:

Below is an example of the JSON and the formatted result.

JSON Example:

Formatted JSON Result

JSON Format Rules

JSON is derived from JavaScript, but no JavaScript knowledge is required to use it. When creating JSON, certain rules must be followed:

  • Data is represented by name/value pairs.

  • Commas separate data.

  • Objects are enclosed in opening and closing curly braces {}.

  • Arrays are enclosed in opening and closing square brackets [].

  • Boolean values are represented using the literals true or false in lowercase.

  • Dates and similar object types are not supported properly and must be converted to strings.

  • Numeric values are in double precision floating point format and must not have leading zeros.

  • Null values are represented by a lowercase null literal.

  • The standard extension for a JSON file is ".json".

  • The MIME type for JSON files is application/json