What does the JSON formatter do?

It takes minified or malformed JSON and outputs it with proper indentation and line breaks. It also validates JSON and reports syntax errors with the exact line and character position.

How do I minify JSON to reduce its size?

Switch to minify mode in the JSON Toolkit. All whitespace and line breaks are removed, producing the smallest valid JSON string suitable for APIs or storage.

Can it detect JSON syntax errors?

Yes. Missing commas, unclosed brackets, unquoted keys and other syntax errors are flagged immediately with the specific error location.

Is my JSON data kept private?

Yes. The JSON Toolkit runs entirely in your browser — your data is never uploaded to any server.

JSON Formatter, Minifier & Validator