JSON Validator
Validate JSON syntax with detailed error reporting. Includes strict mode and formatted output for valid JSON.
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View all JSON tools →How to Use
- 1
Enter JSON
Paste or type your JSON code into the input field.
- 2
Configure options
Enable strict mode to disallow trailing commas and comments, or toggle structure view to see the parsed data.
- 3
Validate
Click Validate to check if your JSON is valid. Errors will show with line numbers and details.
- 4
Format if valid
If valid, you can copy the formatted JSON output.
JSON validation checks whether a string conforms to the JSON specification. Valid JSON must have properly quoted strings, correct brackets and braces, and no trailing commas (in strict mode). Even a single misplaced character makes JSON invalid.
- •Debugging API responses
- •Validating configuration files
- •Checking data before parsing
- •Verifying JSON exports
- •Troubleshooting webhook payloads