JSON Key Counter — Free Online Tool
Paste your JSON and instantly see how many top-level keys it contains. A handy utility for developers, testers, and data analysts.
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JSON Key Counter Online
This tool lets you paste a JSON object and instantly counts how many top-level keys it has. It helps developers quickly understand the structure and complexity of a given JSON payload.
Why JSON Key Count Matters
- Useful for API response validation and payload auditing.
- Helps identify excessive nesting or unnecessary fields.
- Ideal for mock data inspection or test automation.
- Gives quick insight when debugging or mapping data in code.
What It Counts
| Metric | Description |
|---|---|
Top-level Keys | Number of properties at the root of the JSON object |
Input Validation | Checks whether the input is a valid JSON format |
Real-time Feedback | Live updates as you type or paste |
How to Use
Paste your JSON into the input area. The tool will immediately count the keys if your input is valid. You’ll see live updates as you type.
Need More JSON Tools?
Check out our JSON Formatter and JSON Field Selector for formatting and field filtering.
Frequently Asked Questions (FAQs)
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