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JSON Beautifier

Beautify, pretty print, and format JSON data online. Paste your minified or messy JSON and get clean, readable, indented output instantly.

Online JSON Beautifier & Pretty Printer

This free JSON beautifier tool lets you pretty print JSON data with customizable indentation. Whether you need to beautify minified API responses, format configuration files, or pretty print JSON for debugging, this tool converts compact JSON into a clean, human-readable format. Our JSON beautifier supports 2-space, 4-space, and tab indentation styles.

JSON Formatting Rules

RuleDescriptionExample
IndentationUse consistent spaces or tabs for nesting2 spaces, 4 spaces, or 1 tab
Trailing CommasNOT allowed after last item in arrays/objects{"a":1, "b":2} (no comma after 2)
QuotesKeys and strings must use double quotes{"key": "value"} not {'key': 'value'}
CommentsNOT supported in standard JSONUse JSONC or JSON5 for comments
Data Typesstring, number, boolean, null, object, array{"str":"hi","num":42,"ok":true,"x":null}

Frequently Asked Questions

What is JSON beautifying?
JSON beautifying (also called pretty printing) is the process of adding proper indentation, line breaks, and spacing to compact or minified JSON data. This makes the JSON structure easier to read, understand, and debug. Beautified JSON uses consistent indentation to show the hierarchy of nested objects and arrays clearly.
What is the difference between JSON beautifier and JSON formatter?
JSON beautifier and JSON formatter are essentially the same thing. Both take unformatted or minified JSON and add indentation and line breaks to make it readable. Some tools use "formatter" to include additional features like sorting keys or validating syntax, while "beautifier" specifically emphasizes making JSON visually appealing and easy to read.
How to pretty print JSON in code?
In JavaScript/Node.js, use JSON.stringify(data, null, 2) where 2 is the number of indent spaces. In Python, use json.dumps(data, indent=2). In Java, use new GsonBuilder().setPrettyPrinting().create().toJson(obj). In PHP, use json_encode($data, JSON_PRETTY_PRINT). Most languages have built-in or library support for JSON pretty printing.

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