JMESPath Tester — Free Online Tool
Write and test JMESPath expressions against JSON data with live results. JMESPath is a query language for JSON used by AWS CLI, jq-style tools, and many APIs. Filter arrays, access nested values, sort, and project specific fields.
100% client-side. No uploads. Your data never leaves your browser.
How to use JMESPath Tester
- Paste JSON into the left pane.
- Enter a JMESPath expression.
- Results update live.
- Use presets to learn common expression patterns.
Frequently Asked Questions
What is JMESPath?
JMESPath is a query language for JSON, designed to extract and transform JSON data. It's used in AWS CLI (--query option) and many other tools.
How is JMESPath different from JSONPath?
Both query JSON, but JMESPath has a slightly different syntax. JMESPath supports built-in functions like sort_by(), min_by(), and contains().
What are the most useful JMESPath expressions?
Array filter: a[?x==`value`]. Field selection: a[*].field. Sort: sort_by(a, &field). Pipe: a | {b: *, c: length(@)}.
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