How to use JSON Reader
- Enter or paste your JSON into the input field to begin.
- Set Expand so the output fits your use case.
- JSON Reader updates the output automatically as you type.
- Finish by choosing Copy to take the output with you.
About this tool
Everything JSON Reader does happens on your own device. JSON Reader 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
How do I use JSON Reader?
JSON Reader runs entirely on your device: add your input using the Expand control, and it processes it locally in real time.
Is JSON Reader free to use?
Yes — JSON Reader is completely free, with no usage limits.
Where is my data processed by JSON Reader?
Entirely in your browser — JSON Reader keeps your data on your own machine and sends nothing anywhere.
Can JSON Reader handle large or deeply nested JSON?
Yes. JSON Reader parses JSON entirely in your browser, so large or nested documents stay on your device and never upload.
Does JSON Reader work on mobile?
Yes — JSON Reader is just a web page and runs on any modern browser, including phones and tablets.