Query JSON with JMESPath

Filter, project, and transform nested JSON with a JMESPath expression.

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ToolJSON JMESPath
Input
Output
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Preview

How it works

The expression is evaluated by the JMESPath interpreter, which can project fields, filter arrays, and apply functions before the result is serialized. The output type is reported separately from the JSON text.

  • The root expression selects the complete document.
  • The interpreter defines projections and filters rather than a custom path splitter.

Worked example

Extract Nested Field
Query a nested field from a JSON object using dot notation
Input
											{"store": {"name": "BookShop", "location": {"city": "Portland", "state": "OR"}}}
Output
												{
  "store": {
    "name": "BookShop",
    "location": {
      "city": "Portland",
      "state": "OR"
    }
  }
}

When to use this

AWS CLI responses, fixture filtering, and API projection pipelines use JMESPath.

Edge cases

  • A missing key in a projection yields a null-like result.
  • String and numeric comparisons follow JMESPath type rules.
  • An invalid expression stops with a parse error.

References