JSON Validator
Check whether JSON is valid.
Runs locally in your browser. No signup.
How it works
- 1 Paste your input.
- 2 Pick options if needed.
- 3 Copy the output.
Trailing commas and comments are not allowed in JSON.
FAQ
What makes JSON valid?
It must follow strict syntax rules, such as using double quotes for keys and strings, and proper nesting.
Does it tell me where the error is?
Yes. It usually points to the specific line or character where the syntax error occurred.
Is my data safe?
Yes. Validation happens locally in your browser.
Does this tool store my input?
No. Your input is processed locally in your browser and is not uploaded or stored.