JSON Validator
Validate JSON, find errors with line numbers, analyze structure. Real-time checking as you type.
Paste JSON to validate it in real-time
Frequently Asked Questions
How does this JSON validator work?▼
Paste or type JSON and it validates in real-time using the browser's built-in JSON.parse(). When errors are found, it shows the exact error message and approximate line/column number.
What structure information does it show?▼
For valid JSON, you get: total keys, max nesting depth, count of objects, arrays, strings, numbers, booleans, nulls, and total byte size.
What are common JSON errors?▼
Trailing commas after the last property, single quotes instead of double quotes, unquoted property names, missing commas between properties, and unbalanced brackets or braces.
Is this different from JSON Formatter?▼
JSON Formatter focuses on formatting and beautifying JSON. This validator focuses on finding errors, showing line numbers, and analyzing the JSON structure.
Is my JSON data safe?▼
Yes. Validation happens 100% in your browser. No data is sent to any server.