How do I format or beautify JSON?

Paste your JSON into the editor and click the "Format" button. The tool will parse and re-indent your JSON with 2-space indentation, making it easy to read.

How do I validate JSON?

Click the "Validate" button in the toolbar. The editor uses JSON.parse() to check your input and shows the exact error position if the JSON is invalid.

Is my data secure in this JSON editor?

Yes. All processing happens entirely in your browser. Your JSON data is never uploaded to any server. There are no accounts or sign-ups required.

What is the tree view?

The tree view shows your JSON as a collapsible, colour-coded hierarchy. Strings appear in green, numbers in blue, booleans in orange, and null values in grey. You can expand or collapse objects and arrays to explore large JSON documents.

JSON Editor

100% Private

100% Local

No Signups

Edit, format, minify, and validate JSON with a live tree view. Runs entirely in your browser — your data never leaves your device.

100% Private — processed in your browser

JSON Input

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Tree View

Paste or upload JSON to see the tree view

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