JSON Formatter
Format, beautify, minify, and validate JSON data with syntax highlighting and detailed error messages.
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About JSON Formatter
This JSON formatter tool helps developers work with JSON data by providing formatting (beautifying), minification, and validation capabilities. It features syntax highlighting for easy reading and detailed error messages for invalid JSON.
Features
- Format / Beautify: Converts compact JSON into a readable, indented format with syntax highlighting
- Minify: Removes all whitespace to produce the most compact JSON string
- Validate: Checks if the input is valid JSON and shows the exact error location
- Syntax Highlighting: Color-codes keys, strings, numbers, booleans, and null values
- Flexible Indentation: Choose between 2 spaces, 4 spaces, or tab indentation
Common JSON Errors
- Missing or extra commas between properties
- Using single quotes instead of double quotes
- Trailing commas after the last property
- Unquoted property names
- Missing closing brackets or braces
JSON Formatting Example
Minified input:
{"name":"John","age":30,"hobbies":["reading","coding"]}
Formatted output (2-space indent):
{
"name": "John",
"age": 30,
"hobbies": [
"reading",
"coding"
]
}
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Frequently Asked Questions
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JSON (JavaScript Object Notation) is a lightweight data interchange format. It is easy for humans to read and write, and easy for machines to parse and generate. JSON is widely used for APIs, configuration files, and data storage.
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Formatted JSON with proper indentation is much easier to read and debug. When working with API responses or configuration files, beautified JSON helps you quickly understand the data structure and spot errors.
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Minified JSON removes all unnecessary whitespace, reducing file size. This is useful for production APIs and data storage where smaller payload sizes improve performance and reduce bandwidth usage.
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Use the Validate button to see the exact error and its position. Common fixes include: adding missing quotes around keys, replacing single quotes with double quotes, removing trailing commas, and ensuring all brackets and braces are properly closed.
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Yes. All JSON processing happens entirely in your browser. No data is sent to any server. Your JSON content never leaves your computer.
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This tool can handle JSON data up to several megabytes in size. For very large files, processing may take a moment. The browser-based approach means there is no upload limit.
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