JSON Viewer

JSON

Read JSON the easy way: every object and array becomes a foldable node showing how many items it holds, with colours for strings, numbers, booleans and null.

No uploadInstant & freeWorks offline

Input — paste, type or drop a .json file

Output

Formatted JSON appears here

How to use the JSON Viewer

1Paste JSON or drop a .json file.
2Click any node to expand or collapse it.
3Use Expand all or Collapse all to navigate large documents.

Frequently asked questions

Are my files uploaded anywhere?

No. Everything runs inside your browser on your own device. Nothing is sent to a server, so it works even offline once the page has loaded.

Can it open big API responses?

Yes. Nodes are only drawn when you open them, and long arrays are shown 100 items at a time, so large documents stay responsive.

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How to use the JSON Viewer

Frequently asked questions