JSON Validator
Validate JSON with detailed error messages and statistics
Processed on your device — never uploaded
JSON Input
Frequently Asked Questions
What are the most common JSON syntax errors?
The most common errors are trailing commas after the last item, using single quotes instead of double quotes, missing commas between items, and unquoted keys.
Does this validator show where the JSON error is?
Yes, when your JSON is invalid, the validator pinpoints the exact line and column number where the parsing error occurred so you can fix it quickly.
What statistics does the JSON validator provide?
For valid JSON, it shows total keys, max nesting depth, counts of objects, arrays, strings, numbers, booleans, and the overall file size in KB.
Can I validate JSON with comments?
No, the JSON specification does not allow comments. If your data contains comments, you need to remove them first or use a format like JSONC or JSON5 that supports them.