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JSON Formatter & Validator

Format, minify and validate JSON. Instant syntax checking with error location.

Free Tool Validation Highlighting
Size: 0 bytes Lines: 0 Keys: 0

Sample JSON

About JSON

What is JSON?

JSON (JavaScript Object Notation) is a text-based data interchange format. Widely used in REST APIs and web applications.

Common Errors
  • • Trailing comma
  • • Single quotes instead of double
  • • Unquoted keys
  • • Comments (not supported)
Data Types
string: "text"
number: 42, 3.14
boolean: true, false
null: null
array: [1, 2, 3]
object: {"key": "value"}
API Work

Use this tool to analyze API responses and prepare test data.