JSON Tree Viewer
Paste or upload JSON and explore it as a collapsible tree. Search keys and values, copy the path of any node, and keep huge documents responsive — rendering is capped and long collections page in their children.
JSON source
About this tool
JSON Tree Viewer turns a pasted or uploaded JSON document into a collapsible tree with per-type colours, full-path breadcrumbs and key/value search that expands ancestors and scrolls each match into view. Parse failures are reported with line, column, a caret on the offending line and the raw browser message. Every byte stays in your browser — nothing is uploaded — so the work is deliberately capped: 4,000 rendered rows per pass, 200 children per collection, 200,000 indexed nodes and a 4.00 MB document limit. Documents over 2,000 nodes open with only the root expanded, and “Expand all” stops at the depth you choose (default 6).
- 100% free — no account needed
- Runs in your browser
- Nothing is uploaded
Frequently asked questions
Is JSON Tree Viewer really free?
Yes. JSON Tree Viewer is completely free on PureBrowser — every feature, with no account, no trial, and no credit card.
Does JSON Tree Viewer upload my data?
No. JSON Tree Viewer runs entirely inside your browser, so anything you type, paste, or open stays on your own device.
Do I need to sign up or install anything?
Neither. There is no account and nothing to download — open the page and JSON Tree Viewer is ready to use on desktop or mobile.
Does JSON Tree Viewer work offline?
Once the page has loaded, yes. All of the processing happens locally in your browser, so it keeps working without a connection.
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