> format | validate | minify <
// Format, validate, and minify JSON data instantly
Pretty Print
Beautify JSON with customizable indentation. Choose 2 spaces, 4 spaces, or tabs for perfect formatting.
Compact Output
Minify JSON by removing all whitespace. Reduce file size for production deployments and API responses.
Syntax Check
Validate JSON syntax instantly. Get detailed error messages with line and position information.
// ABOUT JSON FORMATTING
What is JSON:
JSON (JavaScript Object Notation) is a lightweight data interchange format defined by RFC 8259. It is easy for humans to read and write, and easy for machines to parse and generate. JSON is built on two structures: objects (key-value pairs) and arrays (ordered lists).
Example:
{"name":"John","age":30} → {\n "name": "John",\n "age": 30\n}
Common Use Cases:
- >API response debugging and inspection
- >Configuration file formatting
- >Data validation before processing
- >Reducing payload size with minification
- >Sorting keys for consistent output
>> frequently asked questions
Q: What is a JSON formatter?
A: A JSON formatter (also called JSON beautifier or pretty printer) takes raw or minified JSON data and reformats it with proper indentation and line breaks, making it human-readable and easier to debug.
Q: What is the difference between prettify and minify?
A: Prettify (format) adds indentation, line breaks, and spaces to make JSON readable. Minify removes all unnecessary whitespace to reduce file size, which is ideal for production use and API transmission.
Q: How does JSON validation work?
A: JSON validation checks whether the input conforms to the JSON specification (RFC 8259). It verifies proper syntax including matching brackets, correct quoting of keys and strings, valid data types, and proper use of commas and colons.
Q: What does sorting keys do?
A: Sorting keys alphabetically reorders all object keys in the JSON structure. This is useful for comparing JSON objects, creating deterministic output, and maintaining consistency across different environments.
Q: How does JSON compare to YAML?
A: JSON uses braces and brackets with strict syntax, while YAML uses indentation-based formatting. JSON is more widely supported in APIs and programming languages. YAML is more human-readable but more complex to parse. Both represent the same data structures.