JSON Viewer
Explore JSON as an interactive tree alongside its source. Expand nested objects and arrays, inspect values, and keep the original text available while you browse.
JSON source editor
Read nested JSON without searching through every line
A tree view turns a JSON document into branches you can expand and collapse. Object branches show property names, array branches show item indexes, and leaf rows show values. Use it to inspect an API response or understand an unfamiliar data structure. The tree updates from valid editor content and opens automatically on this page.
How to use the JSON Viewer
- Paste valid JSON into the source editor.
- Expand or collapse object and array branches in the tree panel.
- Edit the source to update the tree, or copy the JSON when you are finished.
JSON Viewer example
{"order":{"id":1042,"items":[{"sku":"PAD-01","quantity":2}],"note":null}}Expand order, then items and [0], to inspect the sku and quantity. The note property is displayed as null.
Syntax checks and data representation
The tool uses JavaScript JSON parsing. Syntax validation does not check a schema or application rules. Formatting and minification parse and serialize the document: duplicate property names collapse to the last value, integer-like keys may reorder, and numbers beyond JavaScript’s safe integer range can lose precision. Keep long numeric identifiers as strings and retain your original source when exact representation matters.
JSON Viewer questions
Can I edit values directly in the tree?
The tree is a read-only view. Edit the JSON in the source editor and the tree updates when the text is valid.
Why is my JSON tree missing?
A tree requires valid JSON. If the editor is empty or contains a syntax error, paste or correct the document first. The validation panel explains parsing errors.
Can I use the tree with a keyboard?
Yes. Branches use buttons. Tab to a branch, then press Enter or Space to expand or collapse it. Expanded state is also exposed to assistive technology.