JSONPath Tester
UtiliStudio Workspace ToolQuery, filter, and extract nested data from JSON documents with declarative JSONPath expressions. Real-time evaluation with syntax guidance.
Key Capabilities
Real-Time Expression Evaluation
Test queries as you type and immediately view matched JSON values, matched paths, and extraction tallies.
Dot & Bracket Property Access
Navigate deeply nested objects using standard dot notation ($.store.book) or bracket notation ($['store']['book']).
Array Indexing & Wildcards
Extract specific array elements by index ($.items[0]), query all elements with wildcards ($.items[*]), or project sub-fields across collections.
Declarative, Safe Query Engine
Query execution runs through a strictly declarative parser with zero code generation or dynamic execution.
How to Use JSONPath Tester
Enter JSON document
Paste your structured JSON payload into the document editor or load sample data.
Write JSONPath expression
Type your query in the path input bar starting with the root symbol $, such as $.items[*].name.
Review match results
Inspect extracted nodes, match counts, and structural highlights in the output pane.
Copy extracted data
Copy the formatted array of matching elements directly to your clipboard for use in code or configuration.
Practical Examples
Extracting Author Names from a Catalog
Use wildcard projection $.store.book[*].author to gather all author names across an array of book objects.
{
"store": {
"book": [
{ "category": "fiction", "author": "Herman Melville", "title": "Moby Dick" },
{ "category": "science", "author": "Carl Sagan", "title": "Cosmos" }
]
}
}
Expression: $.store.book[*].authorMatch Count: 2
[
"Herman Melville",
"Carl Sagan"
]Common Use Cases
Inspecting Complex API Responses
Isolate critical data fields from sprawling multi-megabyte JSON payloads returned by REST APIs and GraphQL gateways.
Testing CI/CD & Build Pipeline Selectors
Validate JSONPath expressions used in GitHub Actions, Kubernetes manifests, and monitoring webhooks before deployment.
Data Extraction for Analytics
Flatten or collect specific entity attributes across arrays for analytical reporting and database ingestion.
Debugging Cloud & Serverless Event Logs
Target exact properties inside AWS CloudWatch, Datadog, or GCP event JSON blobs with surgical precision.
Frequently Asked Questions
Which JSONPath syntax elements are supported?
The evaluator supports the root identifier ($), dot and bracket property access ($.name, $['name']), array index lookups ($.items[0]), array wildcards ($.items[*]), object wildcards ($.*), and array length properties ($.items.length).
How are expression errors communicated?
Invalid queries—such as missing the initial $ root symbol, unmatched brackets, or unclosed quotes—produce real-time syntax indicators highlighting the exact issue.
Can I extract matching values across arrays and nested objects?
Yes. Using wildcard projections like $.items[*].id or $.*.name extracts matching values across all matching child properties into a clean list of results.
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