JSON Validator
Validate JSON syntax against RFC 8259 with exact line and column error indicators and structure counts.
How to Use JSON Validator
- Input JSON String: Paste the JSON snippet you want to check into the validator editor.
- Run Syntax Validation: Click 'Validate JSON' or press Ctrl+Enter.
- Review Diagnostic Report: If valid, review structural stats (key counts, depth, arrays). If invalid, inspect the highlighted line and column error coordinates.
Frequently Asked Questions
What common JSON errors does this validator catch?
It detects trailing commas after the last array/object item, single quotes instead of standard double quotes, unquoted keys, missing colons, and mismatched curly or square braces.
Does the validator provide line and column numbers for syntax errors?
Yes! If an error is detected, the validator pinpoints the exact line and column position where parsing failed.
What structural insights are shown for valid JSON?
You receive root type identification (Object vs Array), total key counts, array elements count, maximum object nesting depth, and raw character metrics.
Is this validator compliant with RFC 8259 standards?
Yes, it conforms strictly to the official IETF RFC 8259 JSON data interchange specification.
Can I load a sample JSON to test the tool?
Yes, click 'Load Sample' to populate the editor with a structured sample object containing arrays, numbers, strings, and nested objects.
Is my JSON transmitted to your servers?
No, validation occurs 100% locally in your web browser.