Online JSON Editor, Viewer & Validator
Inspect and edit JSON side-by-side with CodeMirror 6 text mode, interactive tree view, and spreadsheet table view.
Guide & Frequently Asked Questions
Tips on editing, formatting, and inspecting complex JSON datasets.
Q: How does the Dual-Pane system work?
You have two independent editor panes (Left and Right). Each pane can be toggled into Text mode (CodeMirror 6), Tree mode, or Table mode. Use the central transfer buttons (→ and ←) to instantly copy data between panes, or swap them.
Q: What is Tree Mode best used for?
Tree mode visualizes JSON as an interactive hierarchy. You can collapse or expand nested nodes, search for specific keys or values, filter paths, and safely edit values without worrying about syntax or bracket errors.
Q: When should I switch to Table Mode?
Table mode is ideal when your JSON contains an array of objects (like database query results or API lists). It automatically parses object keys into column headers, allowing you to sort and review data like a spreadsheet.
Q: Is my JSON data kept private?
Yes, 100%. All parsing, formatting, tree manipulation, and CodeMirror editing are handled entirely in your browser using client-side JavaScript. No data is ever sent to or stored on any remote server.