JSON Keys Extractor
List every key path in a JSON document so you can quickly map, document or diff the shape of a payload. When an API response is deeply nested it is hard to see at a glance which fields exist, and this tool solves that by walking the whole structure and printing each unique dot notation path down to its leaves. Nested object keys are joined with dots, array elements are shown with bracketed indices, and the resulting list is sorted so you can scan it or paste it into documentation. It is a fast way to build a field checklist, sanity check that a required key is present, or compare two responses. Paste your JSON, click extract, and copy the list of paths. Everything runs locally in your browser, so the payloads you inspect are never uploaded or stored on a server.
How to use JSON Keys Extractor
- Paste your JSON document.
- Click extract to list the key paths.
- Copy the unique keys.
Frequently asked questions
What does it list?
It lists every unique key path found in the JSON, including keys inside nested objects and arrays, so you can see the full shape of the payload.
How are nested keys represented?
Nested keys are shown as paths that reflect their location in the structure, which helps you map or document the data.
Why extract just the keys?
A key list is useful for building schemas, mapping fields or understanding an unfamiliar API response without the noise of values.
What is JSON Keys Extractor?
List every key path in a JSON document so you can quickly map, document or diff the shape of a payload. When an API response is deeply nested it is hard to see at a glance which fields exist, and this tool solves that by walking the whole structure and printing each unique dot notation path down to its leaves.
Is JSON Keys Extractor free to use?
Yes. JSON Keys Extractor is completely free, with no sign-up and no usage limits.
Does JSON Keys Extractor work in a web browser?
Yes. JSON Keys Extractor runs in any modern web browser. There is nothing to download or install.
Is my data private with JSON Keys Extractor?
Yes. JSON Keys Extractor runs entirely on your device in your browser, so nothing you enter is uploaded to a server.
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