JSON Formatter
Paste raw JSON and get a clean, indented version — or the opposite, a compact one-liner. Errors are reported with their exact position so you can fix them fast.
Free Runs in your browser No sign-up
Updated as you type
How to use
- Paste JSON
From an API, a config file or a log line.
- Choose indentation
2 or 4 spaces, tabs, or minify.
- Copy the result
Invalid JSON is flagged, never mangled.
Supported formats
- Input: JSON
- Output: JSON
Limits & notes
- Very large documents (>5 MB) may take a moment.