How to use JSON Cleaner
- Start by adding the JSON you want to format into JSON Cleaner.
- Set Mode so the output fits your use case.
- Press Clean JSON and JSON Cleaner shows the result straight away.
- Use Copy to keep or reuse the result.
About this tool
Everything JSON Cleaner does happens on your own device. JSON Cleaner validates and reshapes your JSON locally with no server round-trip.
Because parsing is local, sensitive payloads never leave the page. No data is sent anywhere, so it stays fast and private by default.
Frequently asked questions
What does JSON Cleaner do?
Use JSON Cleaner to format your input without installing anything using the Mode control; everything happens client-side.
Does JSON Cleaner cost anything?
No — JSON Cleaner is completely free, with no sign-up and no hidden limits.
Does JSON Cleaner upload my data?
No — JSON Cleaner processes everything locally in your browser, so nothing you enter is uploaded or stored.
Can JSON Cleaner handle large or deeply nested JSON?
Yes. JSON Cleaner parses JSON entirely in your browser, so large or nested documents stay on your device and never upload.
Does JSON Cleaner work offline?
Once the page has loaded, JSON Cleaner keeps working with no network connection.