JSONToolkit

JSON Editor

A live JSON editor with syntax highlighting, inline error detection, undo/redo and one-click auto-format. Edit JSON safely in the browser.

Edit JSON with confidence

The online JSON editor gives you syntax highlighting, real-time error detection with exact line and column numbers, undo/redo and one-click auto-format. Save your work and generate a shareable public link.

Frequently asked questions

Does the editor detect errors as I type?+

Yes. The JSON editor highlights syntax and shows the exact line and column of any error in real time, with one-click auto-format.

Can I save and share what I edit?+

Yes. Use Save & Share to store the document and get a public, read-only link (requires a database connection to be configured).

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