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JSON Validator

Local processing
Validate JSON syntax with detailed error messages
JSON Input
Validation Result
Common JSON Errors
JSON Quick Reference
  • Strings must use double quotes
  • Numbers can be integers or floats
  • Booleans: true or false (lowercase)
  • Null value: null (lowercase)
  • Arrays: [item1, item2, ...]
  • Objects: {"key": value}