Evaluate complex JSON expressions for API Automation. Works exactly like Rest-Assured and Postman path extraction logic.
| $ | The root object. All expressions must start with this. |
| .. | Deep scan. Finds a key recursively regardless of depth. |
| * | Wildcard. Matches all elements in an array or properties in an object. |
| [n] | Array index. Use [0] for first, [-1:] for last. |
| ?() | Filter expression. Example: [?(@.price < 10)]. |
In modern API Testing, responses often return massive JSON payloads. Manually finding a value like a token or userId buried in nested arrays is error-prone. This evaluator allows Automation Engineers to test their path logic before implementing it in codebases like Java Rest-Assured, Playwright, or Postman.
Our tool uses 100% client-side JavaScript. When you enter a JSON string and an expression, the browser's engine parses the data tree locally. This ensures maximum privacy—your sensitive test data is never sent to our server. If you paste a messy, unformatted string, simply click the Beautify button to transform it into a readable structure.
The evaluator provides instant feedback. If you see an INVALID DATA error, it usually means your Input JSON has a syntax error (like a missing comma or quote). If the result is an empty array [], your path is valid, but the specific key or value does not exist in that structure. Remember, JSON keys are case-sensitive!
Suppose you have a list of users and want to find only those who are "active". Instead of writing a complex for-loop in Java, you can use a filter expression like: $.users[?(@.status == 'active')]. Use our Interview Question Bank to find more logic challenges where this tool can help you practice.
This JSONPath Evaluator is part of the Software Testers Hub suite of free tools designed to empower the QA community. Whether you are debugging a flaky test in Jenkins or preparing for an SDET technical round, our tool provides a limitless environment to master data extraction logic.
By using this tool, you can integrate your findings into your Daily Status Reports or use it to audit your test scenarios with our Scenario Audit Tool