JSON Key Extractor

Extract flat JSON paths from nested objects and arrays in seconds.

JSON input

Unique keys only Include array indexes ([0], [1])

Max depth

Sort output

About This Tool

This free online JSON Key Extractor scans deeply nested JSON and returns flattened key paths. Use it for API payload audits, schema reviews, test fixture prep, and field mapping tasks.

Everything runs in-browser for privacy. No JSON input is uploaded to the server.