INTERACTIVE TOOL
JSON formatter and validator
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How to use this tool
- Paste a JSON document without comments.
- Correct reported syntax errors.
- Choose indentation and copy formatted output.
Automatic answerThe result updates while you change the fields.
Worked example
The object {"name":"Utilia","active":true} is valid JSON; keys require double quotes.
Assumptions and limits
It checks syntax, not a business schema, and does not execute code. Avoid confidential data.
Frequently asked questions
Is my data uploaded?+
No. Parsing happens locally with JavaScript.
What happens to my inputs?+
Calculation inputs are processed locally in your browser. Favorites and preferences may be saved on this device. The site may perform separate network requests for live panels; these do not include the values entered into this local calculator. Do not paste secrets into public tools.
How should I check the result?+
It checks syntax, not a business schema, and does not execute code. Avoid confidential data.