JSONPath Tester — Query & Extract JSON Data

Test JSONPath expressions against your JSON data with real-time result highlighting. Supports dot-notation and bracket-notation queries. 100% client-side.

JSONPath ExpressionBase Context: $

JSON Input

0 chars

Output

—

🛡️Zero server logs. Evaluation runs 100% inside your browser.

JSONPath Tester — Query & Extract JSON Data

Test JSONPath expressions against your JSON data with real-time result highlighting. Supports dot-notation and bracket-notation queries. 100% client-side.

🔒 Client-side only⚡ Web Worker processing🌐 Works offline🛡️ Zero server logs

How to Use

Paste your JSON data into the input editor.
Enter a JSONPath expression (e.g., $.store.book[*].author) and see results instantly.
Copy the extracted results or refine your expression for precise data querying.

Frequently Asked Questions

Questions about this tool? We've got answers.

What JSONPath syntax is supported?

The tool supports standard JSONPath syntax including dot-notation ($.store.book[0]), bracket-notation ($["store"]["book"][0]), wildcards (*), filters (?(@.price<10)), and recursive descent (..).

Does it support real-time evaluation?

Yes. Results update automatically as you type your JSONPath expression, with matching nodes highlighted in the output panel.

Is my data sent to any server?

No. All processing runs 100% inside your browser via a Web Worker.

Automated E2E Test Suite Logs

Our build systems validate edge-case processing under extreme conditions before each deployment.

Stability

100.0%

Passed

30/30

Env

V8-Sandbox

Engine: Vitest RunnerUpdated: 2026/6/11 00:18:12📦 Download Test Datasets

PASSevaluateJsonPath should evaluate $.address.city on benchmark data

PASSevaluateJsonPath should evaluate $.hobbies[0]

PASSevaluateJsonPath should evaluate $.hobbies[*]

PASSevaluateJsonPath should evaluate $..city

PASSevaluateJsonPath should return empty array for non-matching path

PASSevaluateJsonPath should evaluate root $

PASSevaluateJsonPath should evaluate wildcard $.*

PASSevaluateJsonPath should throw on empty JSON input

PASSevaluateJsonPath should throw on empty path

PASSevaluateJsonPath should throw on invalid JSON

PASSevaluateJsonPath should handle empty object

PASSevaluateJsonPath should return expression and count

PASSJsonPathTesterTool renders Extract button

PASSJsonPathTesterTool renders JSONPath Expression header

PASSJsonPathTesterTool renders JSON Input and Output labels

PASSJsonPathTesterTool shows Load URL button

PASSJsonPathTesterTool renders two textareas

PASSJsonPathTesterTool shows privacy strip

PASSJsonPathTesterTool shows error toast on Extract with empty input

PASSJsonPathTesterTool shows Clear toast on Reset All click

PASSJSONPath Tester Worker Standard JSONPath queries should evaluate simple root path

PASSJSONPath Tester Worker Standard JSONPath queries should evaluate child property path

PASSJSONPath Tester Worker Standard JSONPath queries should evaluate array index path

PASSJSONPath Tester Worker Standard JSONPath queries should propagate requestId correctly

PASSJSONPath Tester Worker Boundary Conditions & Error Handling should return error for invalid JSON

PASSJSONPath Tester Worker Boundary Conditions & Error Handling should return error for empty JSON string

PASSJSONPath Tester Worker Boundary Conditions & Error Handling should return error for empty JSONPath

PASSJSONPath Tester Worker Boundary Conditions & Error Handling should handle wildcard path expression

PASSJSONPath Tester Worker Boundary Conditions & Error Handling should handle empty object gracefully

PASSJSONPath Tester Worker Performance Benchmark should process large JSON within acceptable limits

⏱️ 0.18ms📦 1.5KB🎚️ Max Nesting: 3🌿 AST Nodes: 48🛡️ V8 Heap: Healthy

$ codecaven-validator --scope=tool● CLUSTER COMPLIANT

Tool Changelog & Updates

1.0.02026-06-10

Feature: Initial release