JSON Formatter
Validate and beautify JSON online: edit on the left, tree preview on the right, with quick syntax error highlighting. This page uses the open-source jsoneditor component.
How to use
- Paste or type JSON text
- Review the formatted output and tree view
- Fix errors from the hints, then copy the result
FAQ
Will invalid JSON be reported?
Yes. Syntax is validated and errors are shown so you can fix and continue editing.
Is it suitable for very large files?
Very large JSON may hit browser memory limits; consider splitting or sampling first.