JSON Validator
Validate, format and analyze JSON. Auto-fix common issues like trailing commas and single quotes.
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Common JSON Issues
- Trailing commas after last item in object/array
- Single quotes instead of double quotes for strings and keys
- Unquoted keys (JavaScript object literal syntax)
- Comments (
//or/* */) — not valid in JSON - Missing quotes around string values
- Use of
undefinedinstead ofnull