Validates JSON, shows it as a collapsible tree, and produces a cleanly formatted, indented copy.
Minified or poorly-formatted JSON is hard to read by eye — this makes it navigable and catches syntax errors with a specific message.
Paste JSON, or upload a .json file. Errors are flagged immediately; valid JSON gets a tree view and a formatted copy.
Read-only — this formats and displays JSON, it doesn't support editing values in place.