JSON Tree Viewer
Inspect JSON paths in a collapsible tree viewer. Explore nested objects and arrays in your browser without uploading. Free, no account, runs locally.
Runs locally in your browser. Your input is not uploaded to DevToolMate servers.
Developer Quick Tips
- Paste API responses or config JSON to instantly inspect nested structure and navigate json paths without horizontal scrolling.
- Click array and object nodes to expand and collapse, see key counts and array lengths at a glance for quick inspection.
- Use the tree view to spot type mismatches and missing fields during incident triage and debugging.
- Inspect deeply nested branches and trace paths before running a diff against your golden fixture.
- Large payloads render safely with depth limits, no browser freeze on massive JSON structures.
Frequently asked questions
Can I use JSON Tree Viewer to inspect API responses?
Yes. Paste any JSON response (REST API, webhook, config file) into the viewer. The tree explorer shows all nested objects and arrays with expandable nodes, making it easy to navigate complex payloads and inspect structure without minification.
How do I navigate JSON paths in the tree viewer?
Click any object or array node to expand and see its children. The tree structure lets you manually trace paths through nested data, inspect values at each level, and collapse branches you don't need. This visual path navigation is faster than scanning minified JSON.
What is the best way to inspect JSON online?
Use a tree viewer to expand and collapse nested objects and arrays. This approach beats minified JSON because you can navigate paths visually, see type information at a glance, and focus on the branches that matter. JSON Tree Viewer runs in your browser with no upload required.
Does JSON Tree Viewer support JSONPath or filtering?
JSON Tree Viewer focuses on visual tree exploration and manual path navigation through expandable nodes. It does not execute JSONPath queries, but the collapsible tree makes it easy to navigate to any branch and inspect the structure you need.
Can I flatten or transform JSON in this tool?
JSON Tree Viewer is designed for inspection and exploration, not transformation. It displays your JSON as a collapsible tree to help you understand structure and relationships. For flattening or reformatting, use a dedicated JSON formatter or processor.
How does JSON Tree Viewer handle very large or deeply nested JSON?
The viewer applies depth limits and caps large sibling lists to prevent browser freeze. You'll see a clear message when a limit is reached, allowing you to inspect the accessible portion without performance issues.
Does JSON Tree Viewer upload my data?
No. JSON Tree Viewer runs entirely in your browser. Your input is never uploaded to DevToolMate servers; it stays on your device for the current session only.
Is JSON Tree Viewer free?
Yes. JSON Tree Viewer is completely free with no account required. Processing happens locally in your browser.
Related tools
- JSON Formatter: Online JSON formatter - beautify and format JSON in your browser with adjustable indentation and key sorting. Free, no upload, no account.
- JSON Validator: Free JSON validator and linter online. Validate JSON syntax in your browser with line-level error messages. No upload, no account, runs locally.