JSON Key Extractor
Extract JSON keys, nested field paths, and structure details from objects and arrays instantly.
Extract keys from JSON data
Result
About this tool
JSON Key Extractor reads JSON data and extracts keys, nested paths, and field names from objects and arrays. It is useful for API inspection, data mapping, frontend integration, backend development, schema review, migration planning, and understanding unfamiliar JSON payloads quickly.
How to use JSON Key Extractor
- Paste valid JSON data into the input area.
- Choose whether to extract top-level keys only or all nested paths.
- Choose the output format you want.
- Click Extract Keys.
- Review the extracted keys, path preview, and summary before copying or downloading.
Why use JSON Key Extractor?
JSON Key Extractor helps you understand JSON structure faster. It is useful when mapping API responses, preparing database fields, checking payload consistency, documenting schemas, or identifying which keys appear in nested data.
Frequently Asked Questions
What does JSON Key Extractor do?
It extracts field names and nested paths from JSON objects and arrays so you can inspect the structure more easily.
Can it extract nested keys?
Yes. You can extract full nested paths such as user.profile.email or items[].price.
Does it work with arrays?
Yes. It handles arrays and can show array-style paths when nested objects appear inside lists.
Does it send JSON anywhere?
No. The parsing and extraction happen locally in your browser on the page.