JSON Tree Viewer
Paste any JSON and explore it as a collapsible, color-coded tree — objects, arrays, keys, and values at a glance.
How it works
- Validates with strict
JSON.parse— no trailing commas, comments, or single quotes. - Builds nested
<details>/<summary>elements, so any node can be expanded or collapsed. - Colors keys and values by type and shows a type badge with the child count on every object or array.
- All processing happens in your browser — nothing is uploaded.
About JSON Tree Viewer
Raw JSON is written as one long line, and even pretty-printed JSON forces you to count braces and brackets by eye. A tree viewer turns the document into nested collapsible rows, so you can fold away whole subtrees and jump straight to the field you care about — the indentation does the counting for you, and color-coding makes types recognizable at a glance.
Reach for a tree view when you are debugging API responses, inspecting generated configuration files, or exploring any deeply nested document where a flat text dump is hard to scan. For very large payloads, rendering thousands of nodes in the browser can slow down or freeze a page, so this tool caps input at 2 MB — if your data is bigger, query the API directly or reduce the response size before pasting it in.