JSON Viewer & Formatter
Inspect, format, validate and query JSON — fast
How it works
Paste or type JSON and it is parsed instantly in your browser. Switch between a formatted text view and an interactive tree: expand and collapse nodes, see type badges, search keys and values, and copy the dotted path to any node. Invalid JSON is reported with the line and column of the problem. Nothing is uploaded.
Frequently asked
How large a file can it handle?
The tree view renders only what is visible, so multi-megabyte documents stay responsive. Extremely large files depend on your device's available memory.
Can I find a value deep in the structure?
Yes. Use the search box to match keys or values; matches are highlighted and the tree expands to reveal them. You can also copy the path to any node.
Is my data private?
Completely. Parsing and formatting happen locally in your browser; no JSON is ever sent to a server.