APILens
open source
APILens
open source
Paste a JSON document and a JSONPath expression to see every matching value. Supports .key, [n], [*], recursive descent with .., negative indices like [-1], and filters like [?(@.price < 10)] with && / ||. Evaluation runs entirely in your browser.
$.key — direct child$.arr[0] / [-1] — index$.arr[*] — wildcard$..key — recursive descent[?(@.price < 10)] — filterJSONPath is a query language for extracting values from JSON documents — the JSON equivalent of XPath for XML. It's standardized in RFC 9535 (2024) after years as a de-facto standard.
Dot notation ($.key), array indexing ([0], negative [-1]), wildcard ([*]), recursive descent (..), and filter expressions ([?(…)]) with comparisons, @.key access, and && / || logic.
Use a filter expression: $.store.book[?(@.price < 10)].title returns the titles of books under 10. Chain with && / || — e.g. [?(@.price < 10 && @.inStock)].
No. The evaluator runs 100% client-side. Nothing is uploaded, logged or tracked.
$.book.title reads a direct child. $..title is recursive descent — it finds every title key at any depth, which is handy when the structure is unknown.
Yes — this page uses the same JSONPath engine as the full APILens tool. Both are MIT-licensed on GitHub.