JSON Formatter, Validator & Beautifier

JSON Formatter, Validator & Beautifier

Symbolizes renewal, the fleeting nature of life, and the beauty of new beginnings.

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To CSVDiff
Output
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Privacy Promise

Your content never leaves your browser. All processing happens locally on your device using JavaScript. We do not store, record, or transmit your input data to any server.

Client-Side Processing
No Server Logs

Free online tool to format, beautify, minify, and validate JSON. Fix JSON errors, structural issues, and format your code with 2-space, 4-space, or custom tab sizes. Prettier your JSON instantly.

Key Features

Format & Beautify

Instantly format and beautify JSON with customizable indentation (2-space, 4-space, or custom tabs). Makes JSON readable and properly structured.

Minify JSON

Compress JSON by removing whitespace and line breaks. Perfect for reducing file size and optimizing API responses.

Validation

Automatically validates JSON structure and syntax. Get instant error messages with line numbers for quick debugging.

100% Client-Side

All processing happens in your browser. Your JSON data never leaves your device, ensuring complete privacy and security.

Frequently Asked Questions

How do I format JSON?▼
Paste your JSON into the editor and click Beautify. The tool automatically adds proper indentation, line breaks, and structure. You can also choose between 2-space or 4-space indentation using the tab size option.
Can I minify JSON to reduce file size?▼
Yes! Click the Minify button to remove all whitespace and line breaks. This is ideal for API responses, configuration files, or anywhere you need to reduce file size without changing the data.
Is my JSON data private and secure?▼
100% private. All formatting and validation happens entirely in your browser using JavaScript. Your data is never uploaded to any server. We cannot see, store, or access your JSON — it never leaves your device.
What JSON errors does this tool detect?▼
The tool detects syntax errors (missing commas, brackets, quotes), invalid structure, trailing commas, and data type issues. Error messages include line numbers to help you locate and fix problems quickly.
What is JSON used for?▼
JSON (JavaScript Object Notation) is used for data exchange between servers and web applications, API responses, configuration files, and storing structured data. It's lightweight, human-readable, and supported by virtually all programming languages.
Can I convert JSON to other formats?▼
Yes! Use our JSON to CSV converter for spreadsheet data, JSON to YAML for configuration files, or JSON to TOON to reduce token usage for AI applications. Each converter is designed for specific use cases.

What is JSON file?

JSON (JavaScript Object Notation) is a lightweight data-interchange format. It is easy for humans to read and write. It is easy for machines to parse and generate. It is based on a subset of the JavaScript Programming Language Standard ECMA-262 3rd Edition - December 1999.

JSON is a text format that is completely language independent but uses conventions that are familiar to programmers of the C-family of languages, including C, C++, C#, Java, JavaScript, Perl, Python, and many others. These properties make JSON an ideal data-interchange language.

JSON Examples

Here is a simple example of JSON data representing a user:

{
  "name": "John Doe",
  "age": 30,
  "isStudent": false,
  "courses": ["Math", "Science"],
  "address": {
    "city": "New York",
    "zip": "10001"
  }
}

JSON Beautifier helps to perform below tasks:

JSON BeautifierJSON ParserJSON EditorJSON ViewerJSON FormatterJSON Pretty PrintJSON MinifyJSON Validator

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