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Edit JSON without friction.

Tree view, table view, Monaco editor, and diff comparison — all local, all fast. Your data never leaves the browser.

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data.json

Tree editor

Navigate nested JSON visually. Click any value to edit in place.

Table view

Arrays of objects unfold into editable spreadsheet-style tables.

Editor

Full syntax highlighting, validation, format.

JSON diff

See every change highlighted side by side.

Export anywhere

JSON, plain text, JavaScript object, or PHP array.

All processing happens locally. Zero telemetry. Open tab and go.

json.tools — JSON Editor