JSONPath is a query language for JSON, similar to what XPath is for XML. It lets you extract specific values from a JSON document using expressions like $.store.book[*].author. It's widely used in tools like jq, Postman, and many cloud services for filtering and transforming JSON data.

Which JSONPath syntax does this tool support?

The tool supports the most common JSONPath features: root ($), child property access (.name), bracket notation (['name']), array indexing (positive and negative), array slicing ([0:2]), wildcard ([*]), recursive descent (..), and basic filter expressions like [?(@.price , =).

Are filter expressions limited?

Yes — filters support a single comparison (@.field OP value) where the value is a number, single-quoted string, or double-quoted string. Compound filters with && or || and function calls (length(), match()) are not supported. For complex queries, use a tool like jq or a server-side JSONPath library.

Why is the result always an array?

JSONPath queries can match zero, one, or many nodes, so the canonical output is always a list. If your query selects a single value (like $.store.bicycle.color), it appears as a single-element array. Most JSONPath libraries follow this convention for consistency.

Is my JSON data sent anywhere?

No. The tool runs entirely in your browser — JSON parsing and JSONPath evaluation both happen client-side using JavaScript. Open the Network tab in browser DevTools while testing — you will see zero HTTP requests carrying your data.

JSONPathテスター

JSONPath式をJSONデータに対してリアルタイムで評価します。フィルター、スライス、ワイルドカード、再帰的探索に対応しています。

JSONPath式

例:

JSON入力

結果(3 matches)

[
  "J. R. R. Tolkien",
  "Herman Melville",
  "Nigel Rees"
]

JSONPath構文リファレンス

$ — root
.property — child property
[n] — array index (negative for end)
[start:end] — array slice
[*] — wildcard
..property — recursive descent
[?(@.field == 'value')] — filter expression

使い方

JSONPath式をJSONデータに対してリアルタイムで評価します。フィルター、スライス、ワイルドカード、再帰的探索に対応しています。

1Paste your JSON document into the input area on the left.
2Type a JSONPath expression in the path field, or click one of the example buttons to start.
3The result panel updates instantly as you type — matched values appear as a JSON array.
4Use bracket notation [n] for array indexing, [*] for wildcards, and [?(@.field == 'value')] for filters.
5Click 'Copy' to copy the result, or 'Reset' to restore the sample JSON and a default expression.

主な機能

Real-time evaluation — see matches update as you type the path or edit the JSON
Built-in examples — clickable buttons demonstrate common JSONPath patterns including filters and slices
Filter expressions — supports comparison operators (==, !=, <, >, <=, >=) on numeric and string values
Recursive descent — use .. to find matching keys at any depth in the document
100% client-side — your JSON never leaves your browser; the entire evaluator runs in JavaScript

よくある質問

詳しく読む

JSONPath in the Browser — A Working Reference and Tester