JSON Validator
Check whether your JSON text is valid and find syntax errors. Everything runs on your device — nothing is sent to a server.
The result will appear here…
or press Ctrl+Enter
Everything runs in your browser. Your data is never sent to our servers.
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Example
Example Input
{"name":"Aji",}Example Output
✗ INVALID JSON — Unexpected token }
How to Use
- 1Paste your data into the Input field.
- 2If the tool has "More settings" (mode, query, columns, etc.), set them as needed.
- 3Click the button (or press Ctrl+Enter) to process.
- 4Copy the result with the Copy button.
About JSON Validator
This tool checks whether your JSON text is syntactically valid. If there is an error, it shows the message so it is easy to fix.
Invalid JSON (trailing commas, wrong quotes, unbalanced brackets) is a common source of bugs. This validator points out exactly where the problem is.
Validation happens in the browser — just paste your data and click. Nothing is uploaded, so it is safe for sensitive data.
FAQ
Is my data sent to a server?
No. JSON Validator runs entirely in your browser using client-side libraries. Your data never leaves your device.