How to use JSON File Viewer
- Drop your JSON into the field at the top of JSON File Viewer.
- Adjust the Expand, File options to match what you need.
- The result is computed live in your browser as you edit the input.
- Finish by choosing Copy to take the output with you.
About this tool
JSON File Viewer is a static, client-side tool with no backend. JSON File Viewer parses JSON entirely in your browser, so large or deeply nested documents stay on your device.
Because parsing is local, sensitive payloads never leave the page. Nothing you enter is uploaded, and it keeps working offline once the page has loaded.
Frequently asked questions
What is JSON File Viewer for?
JSON File Viewer lets you process your input right in the browser using the Expand, File controls, with the result shown instantly and nothing uploaded.
Do I need an account for JSON File Viewer?
No — JSON File Viewer needs no account, sign-up or installation.
Does JSON File Viewer upload my data?
No — JSON File Viewer processes everything locally in your browser, so nothing you enter is uploaded or stored.
Can JSON File Viewer handle large or deeply nested JSON?
Yes. JSON File Viewer parses JSON entirely in your browser, so large or nested documents stay on your device and never upload.
Does JSON File Viewer work offline?
Once the page has loaded, JSON File Viewer keeps working with no network connection.