JSON Validator
Text & HTML ToolsValidate JSON syntax with exact error positions, line and column numbers.
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JSON Validator
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About JSON Validator
Validate JSON syntax against the strict RFC 8259 specification. Identify syntax errors, unquoted keys, trailing commas, single quotes, and invalid escape characters with exact line and character positions.
View key capabilities & tips
Key capabilities:
- Real-time syntax parsing according to RFC 8259 standards
- Pinpoint error reporting highlighting line, column, and unexpected token context
- Visual success badge confirming valid, production-ready schema
- Completely client-side validation ensures sensitive customer data never leaves your computer
Tips:
- Standard JSON requires double quotes (`"key"`) for property names; single quotes (`'key'`) are invalid.
- Trailing commas after the last array item or object property (e.g. `[1, 2, ]`) will trigger validation errors.
- Use the JSON Formatter tool after validation to format clean, readable output.