How to Format and Validate JSON Online

JSON must be syntactically perfect — a missing comma or trailing comma will break parsers. When debugging APIs or config files, a reliable formatter saves time.

## Format (beautify)

Paste minified JSON into the JSON Formatter and choose **Format**. The tool adds consistent indentation so you can read nested structures quickly.

## Minify

Minified JSON removes whitespace for production payloads. Use **Minify** before embedding JSON in HTML or sending over slow connections.

## Validate

The **Validate** mode parses your input and reports syntax errors with line hints when possible. No data leaves your browser.

## Tips

- Always validate after hand-editing config files. - Use minified JSON in production; formatted JSON in development. - Keep backups before bulk find-and-replace in large JSON files.