JSON to Validate
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Frequently Asked Questions
What makes a JSON file invalid?
Common issues include tracking commas (a comma after the last item), missing quotes around keys, or using single quotes instead of double quotes. Our validator catches these errors instantly.
How can I prettify minified JSON?
Paste your minified (single-line) JSON into the editor and click 'Validate & Beautify'. It will add proper indentation and newlines for readability.
Is this JSON Validator secure?
Yes, unlike many other validators, Formatly.org does not send your JSON data to a backend server. Validation occurs locally in your browser.