Free tool
JSON Formatter
Validate and format JSON quickly. The tool shows syntax errors and lets you switch between pretty and minified output.
Generated: JSON OK
How to use
- 1. Fill in the fields for your use case.
- 2. Review the result generated by the tool.
- 3. Adjust values to compare scenarios or produce a cleaner output.
Example
Paste an API response to indent the JSON, find syntax issues and copy a readable version.
What is included
- JSON validation.
- Pretty formatting with indentation.
- Minification for compact output.
Frequently asked questions
Is my JSON uploaded?
No. Validation and formatting happen locally in your browser.
Does it fix invalid JSON?
It points out syntax errors but does not automatically change invalid content.
Can I format large JSON files?
Yes, as long as your browser can process the text comfortably.