Paste or type your raw JSON into the input textarea on the left.
Click the Format button to pretty-print the JSON with proper indentation.
Use the Validate button to check if your JSON is syntactically correct.
Copy the formatted, validated JSON from the output area.
All processing is client-side. Your data never touches any server.
No page reloads or server round-trips. Results appear as you type or paste.
No registration, no usage caps, no premium tiers. Use as much as you need.
Fully responsive. Works on desktop browsers, tablets, and mobile phones.
A JSON formatter takes raw, unformatted JSON and applies proper indentation, line breaks, and spacing so the data becomes human-readable. It can also validate the JSON syntax and highlight errors.
Yes. All JSON formatting and validation runs entirely in your browser using JavaScript. Your data is never sent to or stored on any server.
Yes. The validator checks for common issues like missing commas, unmatched brackets, trailing commas, and invalid data types. Errors are displayed clearly so you can fix them quickly.