DEVELOPER · JSON

JSON tree viewer

Lazy-expand nested JSON, search nodes, and copy paths.

Browse JSON as a lazy expandable tree, search keys and values, jump to results, and copy JSON Pointer paths or node values.

Local only · safe DOM nodes

Parse JSON

JSON input

Node count—

Maximum depth—

Limits & safety

Input is limited to 1,000,000 characters, 50,000 nodes, and 100 nesting levels.
Objects and arrays render children only when expanded, reducing initial DOM cost.
Keys and values are assigned with textContent; JSON content is never inserted through innerHTML or executed.

How do I use it?

Paste JSON to expand the tree.

Is anything uploaded?

Everything runs locally in your browser and is not uploaded.

How is this different?

The formatter edits text; the tree is for exploring structure.