Analyze JSON
Validate your JSON strings and display detailed statistics including total objects, keys, nested depths, and data type breakdowns.
JSON Analyzer - Validate and Inspect JSON Structure Metrics
Welcome to the online **JSON Analyzer**. This free, web-based utility is designed to help developers, data analysts, and QA teams inspect, validate, and understand the internal structure of their JSON (JavaScript Object Notation) files. Simply paste your raw JSON string to receive immediate syntax validation, detailed statistics on nested depths, and data type counts.
What does the JSON Analyzer do?
JSON data configurations can easily grow to thousands of lines, with deep nesting of keys, arrays, and objects. Spotting structural patterns, finding specific nested paths, or counting array elements manually is nearly impossible. The **JSON Analyzer** instantly parses your string client-side and generates a clean visual dashboard showing critical metrics:
- Syntax check: Provides real-time syntax checking. If there are syntax errors, it identifies the exact line and position so you can correct them.
- Data Type Distribution: Get precise counts of all primitive and complex data types (how many child objects, arrays, string values, integers/floats, booleans, and nulls exist).
- Depth Metrics: Measure the maximum nesting level of your document. Useful for identifying deeply nested structures that could trigger recursion limits in some APIs.
- Key Path Explorer: Browse a comprehensive, searchable list of all nested key paths (using standard dot-notation and index-notation, e.g.
data.profile.tags[0]) and inspect their resolved values.
How to Analyze Your JSON Payload
- Paste JSON: Input your raw JSON string into the editor. You can also click the **Sample** button to load a pre-configured multi-level structure.
- Check Validation: If the JSON is malformed, look at the error card which highlights the parser exception details.
- Read Metrics: Inspect the stats cards showing total byte size, key counts, maximum depths, and type distributions.
- Search Path Node: Use the interactive **Key Path Explorer** search bar to quickly find where a specific key is located and check its data type.
Also check Extract JSON Keys, Extract JSON Values, and JSON Editor for more JSON exploration.
Frequently Asked Questions
Is there a file size limit for analyzing JSON?
Because the tool is fully client-side and runs entirely within your browser's V8 engine, it can comfortably parse and analyze files up to several megabytes. Extremely large files (e.g. hundreds of megabytes) may cause brief UI freezes while the browser computes recursive metrics.
Does the analyzer store or upload my JSON strings?
No. Your data privacy is guaranteed. The parsing and analysis are calculated in real-time inside your local browser sandbox. No networks requests are sent, and no data is shared or stored on any remote servers.
What is considered the "Maximum Depth" of a JSON?
Maximum Depth represents the deepest level of nesting inside your document. For example, a flat key-value object `{"a": 1}` has a depth of 1. A nested object `{"a": {"b": 2}}` has a depth of 2. Deep nesting can sometimes cause memory parsing limits on strict server environments.
Can I search for specific nested keys using this tool?
Yes! The **Key Path Explorer** in the right column displays every resolved path using dot and bracket notation. Type any keyword into the explorer search bar to instantly filter paths matching that key or type.
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