JSON Key Extractor

Extract keys, dot notation paths, value types, and nested field structure from JSON directly in your browser.

JSON Input

Paste a JSON object, array, API response, configuration file, or log payload to inspect its key structure.

Extraction Options

Include array indexesShow paths like users.0.name instead of users.name.Leaf keys onlyShow only final value paths and skip parent object paths.

Output Format

Extracted Keys

Extracted JSON keys and paths will appear here.

JSON key extraction happens directly in your browser. Your JSON input is not uploaded to a server.

Extracting JSON Keys and Paths from API Responses

Large JSON payloads can be difficult to inspect manually, especially when they contain nested objects, arrays, configuration values, and repeated fields. Extracting JSON keys helps you understand the shape of an API response or data file before mapping, validating, or transforming it.

This JSON Key Extractor reads your JSON structure and generates field names, dot notation paths, value types, and nested depth information. It is useful for API debugging, documentation, frontend mapping, backend validation, data migration, and structured data review.

Checking Nested JSON Structure Quickly

Paste valid JSON into the input box.
Choose whether to include array indexes or only leaf fields.
Select detailed output, paths only, or unique keys.
Click Extract JSON Keys and copy the result.

Common JSON Key Extractor Use Cases

Understanding API response fields before integration.
Finding nested JSON paths for frontend or backend mapping.
Preparing field lists for documentation or validation rules.
Reviewing JSON exports from analytics, logs, or databases.
Comparing data structures before building transformations.

Example JSON Paths

user.id
user.profile.role
user.profile.skills
settings.notifications.email

Frequently Asked Questions

What does a JSON Key Extractor do?

It scans JSON input and extracts field names, nested paths, data types, and structural depth so you can understand the JSON shape quickly.

What is a JSON path in this tool?

A path is a dot notation reference to a nested value, such as user.profile.role or settings.notifications.email.

Can this extract keys from arrays?

Yes. The tool can inspect arrays and optionally include numeric array indexes in the generated paths.

Is my JSON sent to a server?

No. The extraction happens locally in your browser. Your JSON is not uploaded or stored.