Test JSONPath expressions against JSON documents with matched value highlighting and result display.
Paste a JSON document and enter a JSONPath expression to see which values the path selects. The tester displays the resulting matches and highlights the corresponding values in the source, making it useful for checking a query before placing it in code or configuration. The usual surprise is that JSONPath produces a list of selected nodes. A valid query can match zero, one, or many locations, so one result should not be mistaken for a guarantee that the expression is singular.
A concrete input and expected output from the current implementation.
Input
JSON:
{"users":[{"name":"Ada"},{"name":"Lin"}]}
JSONPath:
$.users[*].name Expected output
[ "Ada", "Lin" ]
$ selects the document root, .users selects the users array, [*] selects both array elements, and .name selects the name member from each element. There are exactly two matching nodes, in the same order as the array elements.
A JSONPath query begins at the root value identified by $. Member segments select object properties, array index segments select particular elements, and wildcards can select multiple children. The tester evaluates the complete expression against the pasted document, lists every matched value, and highlights the source values associated with those matches.
Results represent selected JSON nodes, not unique text values. If two different locations contain the same string, both locations can appear as separate matches. A query that reaches an existing property whose value is null also differs from a query that reaches no property. The displayed match count and highlighting help distinguish these cases.
No. The tester evaluates the expression against the document and reports selected values; it does not use JSONPath as an update language. Editing, deleting, or replacing a matched property must be done separately. Because the document is processed in the browser, the pasted JSON is not uploaded by this tool.
The application may implement a different JSONPath dialect or support a smaller feature set. Compare the disputed syntax, especially filters or functions, with the application's own documentation and RFC 9535. Also test the exact runtime document: a changed property name, array shape, capitalization, or value type can produce no matches even when the expression remains valid.
The example and behavioral notes were checked against the browser implementation. Standards and primary references below define the relevant format, formula, or platform behavior.
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