JSON Formatter

JSON Formatter

This JSON Formatter tool takes raw, minified, or poorly indented JSON and reformats it with consistent indentation and proper structure. It makes dense JSON readable by adding line breaks and spaces according to standard formatting conventions.

The formatting runs entirely in your browser using the js-beautify library. Your JSON data never leaves your device, making this tool ideal for quickly inspecting API responses, configuration files, or any JSON payload.

How to use

1. Paste your raw or minified JSON into the input editor.
2. Click Format JSON to apply indentation and structure.
3. View the beautified JSON in the output editor with proper formatting.
4. Use Copy for the clipboard, Download for a .json file, or Clear to reset both editors.

What is JSON?

JSON (JavaScript Object Notation) is a lightweight data-interchange format that is easy for humans to read and write and easy for machines to parse and generate. It is based on a subset of JavaScript and uses key-value pairs and ordered lists to represent structured data.

JSON has become the de facto standard for data exchange on the web, used extensively in REST APIs, configuration files, and document databases. Well-formatted JSON is essential for debugging, code reviews, and maintaining readable configuration files.

Input notes

The tool accepts any valid JSON input, whether it is a single line of minified data or already partially formatted. If the input contains invalid JSON syntax, the tool will report an error so you can fix the structure before formatting.

Example

Minified JSON becomes readable after formatting:

--- Input (minified) ---
{"name":"Alice","age":30,"skills":["JavaScript","Python","Go"]}

--- Output (formatted) ---
{
  "name": "Alice",
  "age": 30,
  "skills": [
    "JavaScript",
    "Python",
    "Go"
  ]
}