How do I format JSON online for free?

Paste your JSON into the Raw JSON panel and click the Format button. The JSON will be pretty-printed with 2-space indentation. The tree view updates automatically to show the structured data.

How do I validate JSON online?

Paste or type JSON in the editor — validation happens automatically as you type. Valid JSON shows a green status. Invalid JSON shows an inline error at the exact line with a description of the syntax problem.

Can I edit JSON in the tree view?

Yes. Single-click any value to edit it inline. Double-click a key to rename it. You can also duplicate or remove any node using the action buttons that appear on hover. Use Tab to move between fields.

Does this JSON editor work with large files?

Yes. The editor uses adaptive debouncing and efficient rendering. Nodes deeper than 2 levels are auto-collapsed on first load to keep the tree manageable. You can expand them on demand.

Is my JSON data safe in this online editor?

Your JSON never leaves your device. All parsing, formatting, validation, and editing happens locally in your browser — no data is sent to any server.

Can I minify JSON online?

Yes. Click the Minify button to compress your JSON into a single line with no whitespace. This is useful for reducing file size before sending JSON over a network.

JSON Editor Online — Free JSON Formatter, Validator & Tree Viewer

Raw JSON

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