JSON Tree Viewer

What is JSON Tree Viewer?

The JSON Tree Viewer renders an interactive, virtualized tree view of any JSON document so the structure and data type of every node are obvious — far easier to navigate than flat text, especially for deeply nested API responses or config files.

How it works

We parse your JSON with our hand-rolled tokenizer (so malformed input is reported with line and column), then lazily walk only the subtrees you've expanded. The visible rows are kept under a fixed height and rendered through a windowed viewport so 100k-key documents stay smooth.

1. Paste or drop a JSON file. Drop a .json file onto the input, or paste text. The tree refreshes as you type.
2. Expand / collapse. Click any chevron, or use Right / Left arrow keys when focused. The tree remembers every expansion across edits to your input.
3. Search and copy paths. Type in the search box to filter the tree; matching nodes auto-expand and the first match is focused. Click the copy icon next to any key to copy its JSON Pointer path.

Examples

Navigating a 10k-user response

Expand `users.0` to read the first record; expand `users.99` to spot-check the last. Only the visited subtrees are walked, so the rest of the document stays unrendered.

Copy a JSON Pointer

Click the copy icon next to any key to copy its path (e.g. `/users/3/email`) to your clipboard for use in jq, JSON Patch, or test fixtures.

Common mistakes

Trying to scroll a fully expanded tree

If you've expanded everything in a very large document, the tree falls back to paging via the visible viewport. Collapse deeper subtrees you don't actually need to see.

Search on heterogeneous arrays

Strings, numbers, booleans and null match by value; objects and arrays match by key (the segment name, not its members' values).

Alternatives

JSON Formatter

If you'd rather see raw text, use the Formatter.

JSON Validator

If the tree is empty, the Validator pinpoints the parse error.

Frequently asked questions