JSON Validator
Validate JSON and find syntax errors.
Validation Status
Awaiting input...
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About JSON Validator
Validate JSON data and find syntax errors instantly. Get detailed error messages with line numbers and descriptions to fix invalid JSON quickly.
How to Use
- 1
Paste JSON
Paste the JSON data you want to validate.
- 2
Check results
See validation status — valid (green) or invalid (red with error details).
- 3
Fix and retry
Fix any reported errors and validate again.
Examples
Valid
Input:
{"name": "John", "age": 30}Output:
✅ Valid JSONInvalid
Input:
{'name': 'John'}Output:
❌ Invalid: Single quotes not allowedFrequently Asked Questions
What makes JSON invalid?
Common issues include trailing commas, single quotes instead of double quotes, missing quotes on keys, unescaped characters, and mismatched brackets.
Does it show where the error is?
Yes, the validator highlights the exact line and character position of syntax errors.
Can it fix JSON automatically?
The validator identifies errors but doesn't auto-fix them. Use the error messages to manually correct your JSON.