How to use JSON Editor Online
- Start by adding the JSON you want to process into JSON Editor Online.
- Adjust the Indent option to match what you need.
- Press Format and JSON Editor Online shows the result straight away.
- When it looks right, Copy to save it.
About this tool
Everything JSON Editor Online does happens on your own device. JSON Editor Online validates and reshapes your JSON locally with no server round-trip.
Clear error positions help you find a stray comma or bracket quickly. Nothing you enter is uploaded, and it keeps working offline once the page has loaded.
Frequently asked questions
What does JSON Editor Online do?
Use JSON Editor Online to process your input without installing anything using the Indent control; everything happens client-side.
Does JSON Editor Online cost anything?
No — JSON Editor Online is completely free, with no sign-up and no hidden limits.
Does JSON Editor Online upload my data?
No — JSON Editor Online processes everything locally in your browser, so nothing you enter is uploaded or stored.
Can JSON Editor Online handle large or deeply nested JSON?
Yes. JSON Editor Online parses JSON entirely in your browser, so large or nested documents stay on your device and never upload.
Does JSON Editor Online work offline?
Once the page has loaded, JSON Editor Online keeps working with no network connection.