How do I format JSON online?▼
Paste your JSON into the input area and it will be automatically formatted with proper indentation. You can choose 2-space or 4-space indentation, and the output includes syntax highlighting.
Does this tool validate JSON?▼
Yes. The formatter automatically validates your JSON and shows specific error messages with line numbers if the syntax is invalid. This helps you quickly identify and fix issues.
Can I minify JSON instead of formatting it?▼
For JSON minification, use our dedicated JSON Minifier tool which removes all whitespace and shows you the exact size savings as a percentage.
Is my JSON data safe?▼
All processing happens in your browser. Your JSON data is never sent to any server. This makes it safe to use with sensitive configuration files, API responses, and private data.