JSON Tree Viewer
Explore JSON as a collapsible, color-coded tree instead of a flat formatted block.
How this tool works
Paste your JSON
Any valid JSON - an API response, config file, or log payload.
Click any node to collapse it
Objects and arrays fold individually, showing their item count while collapsed.
Use expand/collapse all
Reset the whole tree to fully open or fully folded in one click.
Scan the color-coded structure
Keys, strings, numbers, booleans, and null each get their own color for fast visual scanning.
Quick facts
- Category
- Formatters & Beautifiers
- Best for
- Navigating a large API response or deeply nested config file to find the part that matters
About this tool
Paste any JSON and explore it as an interactive, collapsible tree rather than a single scrollable block of formatted text - every object and array node can be expanded or collapsed individually, with keys, strings, numbers, booleans, and null each shown in a distinct color so the shape of the data is visible at a glance. This is a genuinely different tool from json-formatter: that tool's job is to produce clean, correctly-indented text output you'd copy elsewhere, while this one is built for navigating a large or deeply nested structure you're trying to understand - collapsing an array of 500 log entries down to one line, or folding away a config section you already know is fine, so you can focus on the part that actually matters. An "Expand all" / "Collapse all" pair resets the whole tree to fully open or fully folded in one click, and collapsed containers show their item count so you know what's hidden before you open it. Useful for exploring a large API response, inspecting a deeply nested config file, or getting oriented in unfamiliar JSON before deciding what to extract. Runs entirely client-side.
Why use this tool
Built for exploring, not just formatting
Unlike json-formatter's flat text output, nodes collapse individually so you can focus on one part of a large structure.
Collapsed nodes show item counts
See how much is hidden inside a folded object or array before deciding to open it.
Type-based color coding
Keys, strings, numbers, booleans, and null are each visually distinct at a glance.
One-click expand or collapse all
Jump between fully open and fully folded without clicking through every node.
Frequently asked questions
json-formatter takes JSON and produces cleanly indented text output meant to be copied elsewhere - it's a formatting tool. This tool instead renders the same data as a navigable tree where every object and array can be individually collapsed, which is far more useful when you're trying to explore or understand a large structure rather than just reformat it for use elsewhere.
Every node collapses independently, so a large array or a deeply nested object doesn't need to be rendered fully expanded - collapse it down to a single line showing its item count, and only expand the parts you actually need to inspect. This makes it practical to explore JSON that would be unwieldy as a flat formatted block.
No - collapsing only affects the display. The tree is built from the exact parsed JSON, and toggling a node's visibility doesn't modify, reorder, or drop any data; expanding it again shows the identical content every time.
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