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JSON Formatter & Validator

Format, beautify, validate, and minify JSON payloads in real-time. Zero telemetry — runs entirely in your browser.

Input JSON
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Formatted Output
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// Formatted JSON will appear here
0 bytes · 0 lines
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JSON (JavaScript Object Notation) Standards

JSON is an open standard file format and data interchange format defined in RFC 8259 and ECMA-404. It uses human-readable text to store and transmit data objects consisting of attribute–value pairs and arrays.

Supported JSON Data Types

  • String: Sequence of zero or more Unicode characters wrapped in double quotes (e.g. "hello"). Single quotes are invalid JSON.
  • Number: Signed decimal number (e.g. 42, -3.14, 1.0e10). Hex or octal notation is not supported.
  • Object: Unordered collection of key-value pairs wrapped in curly braces { ... }.
  • Array: Ordered sequence of zero or more values wrapped in square brackets [ ... ].
  • Boolean: Either true or false.
  • Null: The empty value literal null.