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JSON Key Extractor Online

Extract and list all unique keys from complex JSON objects at any depth. Processed 100% in your browser — files never touch our servers.

Source JSON Import

Extracted Keys

Key Extraction Depth

Root is depth 1. Use * for everything, or numbers (e.g. 1, 2, 4) and ranges (e.g. 2-5).

Key Separator Symbol

Choose how the extracted keys should be separated in the result window.

Total Keys Found0

Unique Keys0

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JSON Key Extractor FAQ

Can I extract keys from specific levels?

Yes. Using our json key extractor, you can set the key extraction depth to specific numbers (e.g., "2") to ignore root level keys.

What happens to duplicate keys?

Our json key extractor online automatically provides a unique list. If a key name appears at multiple levels, it will only be listed once in the results.

Is there a limit on JSON size?

Our json key list generator works based on your browser's memory. Most users can extract keys from json files up to several megabytes instantly.