JSON Validator
Check your JSON for syntax errors and structural validity. Get detailed error messages and line numbers.
Waiting for input...Tool Settings
Waiting for Input
Paste content to start linting
- Double quotes for keys
- No trailing commas
- Correct nesting of brackets
- Valid primitive types
All processing happens locally in your browser. Large files are handled in memory and never uploaded to any server.
Professional JSON Validator for Everyone
Debug your JSON data effortlessly with our professional JSON Validator. It performs a deep scan of your JSON structure to ensure it follows the RFC 8259 standard. If an error is found, the validator provides the exact line number and a descriptive message (e.g., 'Missing comma', 'Unterminated string') so you can fix it instantly. It also supports checking for common pitfalls like trailing commas which are invalid in standard JSON.
Security Note
All processing happens in your browser. Your images never leave your device.
How to use JSON Validator?
Follow these simple steps to get the best results.
Paste the JSON you want to verify into the validator.
Check the 'Status' indicator (Green for Valid, Red for Invalid).
If invalid, look at the error list to see exactly where the problem is.
Fix the errors in the editor and wait for the status to turn green.
Frequently Asked Questions
Common questions about our JSON Validator tool.
Does it support JSONC (JSON with comments)?
Standard JSON does not support comments. Our validator adheres to strict JSON standards, but we provide an option to 'Ignore Comments' if needed for development files.
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