 JSON / JsonPath Validator

The JSON / JsonPath Validator lets you test JsonPath expressions against a JSON document, format JSON with syntax error highlighting, and auto-generate JsonPath from the cursor position.

:::info Screenshot needed — light/dark 📸 json-jsonpath-validator-light.png and json-jsonpath-validator-dark.png — Full view with JSON document on left, JsonPath and results on right :::

Interface

The tool uses a split-pane layout:

• Left — JSON Document editor (syntax-highlighted) with Load Example and Format Document buttons, and a live Path: display at the bottom
• Right, top — JSON Path input
• Right, bottom — Read-only Result editor
• Bottom — Error message area and the Evaluate button

Live Path Display

As you move the cursor through the JSON document, the current JsonPath is displayed in real-time in the Path: bar at the bottom of the left pane. This is useful for discovering the path to a deeply nested value without manually counting array indices.

Formatting JSON

Click Format Document to pretty-print the JSON with proper indentation. After formatting, code folding is enabled for objects and arrays.

Error Highlighting

If the JSON contains syntax errors, formatting will:

1. Still produce a best-effort formatted output
2. Display the error line, position, and message in the status bar (for example "JSON Error at Line 3, Position 12: …")
3. Highlight the error location with a red squiggly underline in the editor

Hover over the squiggly underline to see the error tooltip.

Evaluating JsonPath

1. Paste or type a JSON document in the left editor
2. Enter a JsonPath expression in the JSON Path input (for example $.store.book[*].title, $.users[?(@.age > 30)])
3. Click Evaluate
4. Results appear in the read-only Result editor as formatted JSON

The expression is validated before evaluation. If the path syntax is invalid, the message "Invalid JSONPath expression: …" is displayed. If the path is valid but matches nothing, the message "The given Json path does not bring any result." is shown.

Generating JsonPath from Cursor Position

Right-click anywhere in the JSON document to access three context menu actions:

Action	Behavior
Show JSONPath from here	Displays the generated path in a dialog
Copy JSONPath to Clipboard	Copies the path to the clipboard
Use JSONPath	Inserts the path into the expression input

See Also

• XML / XPath Validator — equivalent tool for XML
• Regular Expression Tester