How to use JSON Viewer Online
- Type or paste your JSON into JSON Viewer Online's input area.
- Tune the Expand control before you process.
- JSON Viewer Online updates the output automatically as you type.
- When it looks right, Copy to save it.
About this tool
JSON Viewer Online runs entirely in your browser. JSON Viewer Online 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 Viewer Online for?
Use JSON Viewer Online to process your input without installing anything using the Expand control; everything happens client-side.
Does JSON Viewer Online cost anything?
No — JSON Viewer Online is completely free, with no sign-up and no hidden limits.
Where is my data processed by JSON Viewer Online?
Entirely in your browser — JSON Viewer Online keeps your data on your own machine and sends nothing anywhere.
Can JSON Viewer Online handle large or deeply nested JSON?
Yes. JSON Viewer Online parses JSON entirely in your browser, so large or nested documents stay on your device and never upload.
Can I use JSON Viewer Online without a connection?
Yes — after the first load JSON Viewer Online runs entirely offline.