Key Facts
- Category
- Data Processing
- Input Types
- textarea, select, checkbox, number
- Output Type
- text
- Sample Coverage
- 4
- API Ready
- Yes
Overview
The JSON Key Extractor is a powerful utility designed to parse complex JSON data and retrieve a comprehensive list of all keys. Whether you are documenting an API response, analyzing deep object structures, or debugging nested data, this tool provides flexible output formats to help you visualize and manage your JSON properties efficiently.
When to Use
- •When you need to generate documentation for an API response or a large configuration file.
- •When you are debugging deeply nested JSON objects and need to map out the available properties.
- •When you need to compare the structures of two different JSON files by extracting their key sets.
How It Works
- •Paste your raw JSON data into the input field.
- •Select your preferred output format, such as a simple list, JSON array, or a hierarchical tree.
- •Toggle options like 'Flatten Nested Keys' or 'Include Data Types' to customize the level of detail in your output.
- •Click process to generate the extracted key map based on your selected configuration.
Use Cases
Examples
1. API Documentation Generation
Frontend Developer- Background
- You received a massive, undocumented JSON response from a legacy API and need to create a data dictionary for your team.
- Problem
- Manually identifying every key in a 500-line JSON object is prone to human error.
- How to Use
- Paste the JSON response, select 'Markdown Table' as the output format, and enable 'Flatten Nested Keys'.
- Example Config
-
outputFormat: markdown, flattenKeys: true, includeTypes: true - Outcome
- A clean Markdown table containing all keys, their data types, and their paths, ready to be pasted into your project documentation.
2. Debugging Nested Configuration
DevOps Engineer- Background
- A complex application configuration file is failing to load due to an unknown key structure.
- Problem
- The nesting is too deep to track manually, making it difficult to spot missing or misplaced properties.
- How to Use
- Paste the configuration file, select 'Hierarchical Tree' as the output format, and set 'Max Depth' to 10.
- Example Config
-
outputFormat: tree, maxDepth: 10, sortBy: depth - Outcome
- A visual tree representation of the JSON structure, allowing you to quickly identify the hierarchy and locate the problematic key.
Try with Samples
json, video, textRelated Hubs
FAQ
Can this tool handle deeply nested JSON?
Yes, you can adjust the 'Maximum Depth' setting up to 20 levels to ensure all nested keys are captured.
What output formats are supported?
You can export the extracted keys as a simple list, a JSON array, a Markdown table, or a hierarchical tree structure.
Does the tool support dot notation for nested keys?
Yes, by enabling the 'Flatten Nested Keys' option, the tool will convert nested paths into dot notation (e.g., user.profile.name).
Can I see the data type of each key?
Yes, enable the 'Include Data Types' checkbox to see whether a key corresponds to a string, number, boolean, object, or array.
Is my JSON data stored on your servers?
No, all processing is performed locally in your browser to ensure your data remains private and secure.