JMESPath Tester

Evaluate JMESPath expressions against JSON data and inspect the result.

JSON
Paste JSON directly or import a file from this device. Invalid JSON is flagged before the query runs.
JMESPath Expression
Enter a JMESPath expression to evaluate against the JSON input on the left. Load an example to try the tool quickly.
Results
Results update as soon as both the JSON input and the JMESPath expression are valid.
Results: 3
[
  "Smith",
  "Jones",
  "Wilson"
]

What It Does

JMESPath Tester lets you run a JMESPath expression against JSON data directly in the browser. You can inspect the matched result, copy it, or download it as formatted JSON without leaving the page.

When To Use It

Use it when you need to prototype a JMESPath query, debug a filter expression, or verify exactly which values a JSON query will return before you embed that expression somewhere else.

What To Expect

The tool validates the JSON input first, then evaluates the JMESPath expression. If either side is invalid, the error is surfaced immediately. When the query succeeds, the result is formatted as JSON and the result count is shown alongside the output.