JSON Key Extractor

A JSON key extractor helps you trim a large array of objects down to just the fields you care about. Instead of rewriting a payload by hand, you can paste the JSON, see all available keys, and choose which ones should stay or be removed.

Why this is useful

This is handy when API responses contain too many fields, when you want to remove sensitive properties before sharing data, or when you need to prepare a smaller structure for import into another tool. It is also useful for turning wide JSON arrays into cleaner exports.

How the selection works

You can switch between include mode and exclude mode, select keys in bulk, and preview the filtered result before exporting it. Since the result can be downloaded as JSON or CSV, the tool works well both for developers and for anyone preparing structured data for spreadsheets.

Everything runs locally in the browser, so you can reshape JSON arrays without sending internal data to an outside service.