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Developer Utility
Validate JSON Syntax
JSON to Validate
Lines: 1Characters: 0Size: 0 B
Drag and drop a .json file here
Structured View
Validated Structure Preview
Validate JSON and click “Generate Tree”.
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Frequently Asked Questions
It checks whether JSON syntax is correct and reports useful error details when the input is invalid.
No. All formatting, validation and minification runs locally inside your browser.
Use Validate to see the error message. Common problems include missing commas, extra commas, unquoted keys and mismatched brackets.