JSON Formatter
Beautify and indent JSON with adjustable spacing.
Indent:
How to use JSON Formatter
- 1Paste your raw or minified JSON into the input box.
- 2Choose an indent size (2 or 4 spaces).
- 3Click Format — invalid JSON shows an error with the problem location.
Why use this tool
- Validates JSON while formatting, so syntax errors are caught immediately.
- Adjustable indentation to match your project's style guide.
- Handles deeply nested objects and large payloads without lag.
Frequently asked questions
What happens if my JSON is invalid?
The tool shows a clear error message describing what's wrong (e.g. a trailing comma or unquoted key) instead of silently failing.
Is my JSON data uploaded anywhere?
No — formatting happens entirely in your browser using JavaScript's built-in JSON parser.