Utilz
JSON Formatter
Format, minify, and validate JSON data
Why Use This Tool?
- Format, minify, and validate JSON data in one tool -- perfect for daily development work.
- Instant syntax error detection pinpoints the exact issue in your JSON structure.
- All processing happens locally in your browser with no data uploaded to any server.
How to Use
- Paste your JSON into the input area
- Click Format to pretty print, Minify to compress, or Validate to check syntax
- Copy the result to your clipboard
FAQ
What does JSON formatting do?
JSON formatting (pretty printing) adds proper indentation and line breaks to make JSON data human-readable. This tool uses 2-space indentation.
How does JSON validation work?
JSON validation checks if your text is valid JSON by parsing it. If there are syntax errors like missing commas, unmatched brackets, or invalid values, the tool shows the specific error message.
What does JSON minification do?
Minification removes all whitespace, line breaks, and indentation from JSON, producing the smallest possible string. This is useful for reducing payload size in API responses and configuration files.
Why is my JSON invalid?
Common JSON errors include trailing commas after the last item, single quotes instead of double quotes, unquoted keys, and comments (JSON does not support comments).
What is the maximum JSON file size this tool can handle?
Since all processing happens in your browser, the limit depends on your device memory. Typically, files up to 5-10MB can be formatted without issues. Very large files may cause slowdowns.