Is my JSON sent to a server?

No. Parsing, path evaluation and filtering all run in your browser. Nothing is uploaded.

What's the difference between $ and @?

$ refers to the root of the JSON document. @ refers to the current element inside a filter expression — for example, $.books[?(@.price > 30)] iterates books and checks each book's own price.

How does $..foo work?

$..foo is recursive descent — it visits every descendant of the root and returns the value of any 'foo' property it finds, at any depth. It's handy for pulling every occurrence of a key out of a nested structure.

Why doesn't my filter syntax work?

This tool supports @.path (truthy) and @.path OP value where OP is ==, !=, >, >=, <, <= and value is a number, quoted string, true, false or null. For anything fancier (script expressions, regex matching, in-operators), use a full library like jsonpath-plus.

Developer Tools

JSONPath Tester

Test JSONPath expressions against your JSON data — entirely in the browser. Supports $ (root), $.foo.bar, $.foo[0], $.foo[*] (wildcard), $..foo (recursive descent) and basic @.path filters like $.books[?(@.price > 30)].

Your input is processed locally in your browser. It is not uploaded to Dueneo.

Loading JSONPath Tester…

How to use

1
Paste your JSON
Drop any JSON — an API response, a fixture, a config file — into the left-hand editor. If the JSON is invalid, you'll see the parse error with a line number.
2
Enter a JSONPath expression
Type a JSONPath starting with $. Use . for child access, [N] for array index, [*] for wildcard, .. for recursive descent, and [?(...)] for filters.
3
Run and inspect matches
Click Run. All matched values are collected and pretty-printed as a JSON array on the right. The match count and byte size are shown below.
4
Try the sample paths
Click any of the sample path chips to load it into the input — handy for exploring the supported syntax.

Common use cases

Verify a JSONPath before using it in jq, Jayway, jsonpath-plus, AWS Step Paths or Kubernetes selectors.
Extract every occurrence of a key from a deeply nested API response (recursive descent).
Filter an array of objects by a numeric or string field without writing a script.
Teach and learn JSONPath syntax interactively, with immediate feedback on each expression.

Limitations

Supported subset: $, @, .name, [N], [*], ..name, [?(...)] with @.path truthy checks and @.path OP value comparisons (OP ∈ ==, !=, >, >=, <, <=).
Not supported: script expressions ([?(...)] with arbitrary JS), slice notation [1:3], comma operators, parent references, regex filters and the in-operator [?(@.foo in [...])].
Inputs larger than 1 MB are rejected to keep the tab responsive.
Recursive descent $..foo walks every descendant of every current node — on very deep JSON this can be slow.

Frequently asked questions

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Loading JSONPath Tester…

How to use

Paste your JSON

Drop any JSON — an API response, a fixture, a config file — into the left-hand editor. If the JSON is invalid, you'll see the parse error with a line number.

Enter a JSONPath expression

Type a JSONPath starting with $. Use . for child access, [N] for array index, [*] for wildcard, .. for recursive descent, and [?(...)] for filters.

Run and inspect matches

Click Run. All matched values are collected and pretty-printed as a JSON array on the right. The match count and byte size are shown below.

Try the sample paths

Click any of the sample path chips to load it into the input — handy for exploring the supported syntax.

Common use cases

Verify a JSONPath before using it in jq, Jayway, jsonpath-plus, AWS Step Paths or Kubernetes selectors.

Extract every occurrence of a key from a deeply nested API response (recursive descent).

Filter an array of objects by a numeric or string field without writing a script.

Teach and learn JSONPath syntax interactively, with immediate feedback on each expression.

Limitations

Supported subset: $, @, .name, [N], [*], ..name, [?(...)] with @.path truthy checks and @.path OP value comparisons (OP ∈ ==, !=, >, >=, <, <=).
Not supported: script expressions ([?(...)] with arbitrary JS), slice notation [1:3], comma operators, parent references, regex filters and the in-operator [?(@.foo in [...])].
Inputs larger than 1 MB are rejected to keep the tab responsive.
Recursive descent $..foo walks every descendant of every current node — on very deep JSON this can be slow.