Pure Frontend · JSONPath Query · Real-time Preview
Zero Dependencies · Works OfflineWhat Does the JSON Path Extractor Do?
The JSON Path Extractor is a pure frontend tool for quickly extracting specific content from JSON data using JSONPath expressions. It supports standard JSONPath syntax including child node selection, array indexing, wildcards, recursive descent, and filter expressions. Enter JSON data and a path expression to preview extraction results in real-time. Ideal for API debugging, data cleaning, and JSON data analysis. All data is processed locally in your browser.
Core Features
- Standard JSONPath Syntax: Full support for $, ., [], [*], .., [?()] and more
- Real-time Preview: Instant results as you type the path expression
- Filter Expressions: Use [?(@.field==value)] conditional filtering with comparison operators
- Quick Path Buttons: One-click syntax insertion for common patterns
- Auto Format: Beautify JSON with one click, with line/column error reporting
How to Use
Step 1: Paste JSON data in the input area, or drag a .json file. Click "Load Example" to try it.
Step 2: Enter a JSONPath expression, e.g. $.users[*].name to extract all user names.
Step 3: Click "Extract" or press Ctrl+Enter to see matching results. Use quick path buttons for syntax help.
Step 4: Copy or download results. Ctrl+Shift+C for quick copy.
Use Cases
API Debugging
Quickly extract specific fields from nested API JSON responses to verify data structure and content.
Data Cleaning
Filter specific records from large JSON datasets, e.g. extract all products with price > 100.
Config Analysis
Extract specific configuration items from complex JSON config files for quick verification.
Automated Testing
Use JSONPath to extract field values for test assertions in automation frameworks.
Extended Knowledge
JSONPath is a query language for JSON, similar to XPath for XML. Core syntax: $ is root, . is child, [] is array index, [*] selects all, .. is recursive descent, [?(expr)] is filter. In filters, @ represents the current node, supporting ==, !=, >, < operators. JSONPath is implemented in many languages: jsonpath-plus (JS), jsonpath-ng (Python).
FAQ
Which JSONPath syntax is supported?
Supports $ root, . child, [] array index, [*] all elements, .. recursive descent, [?()] filter expressions, [start:end] slicing.
Will my data be uploaded?
No. All JSON parsing and path queries happen in your browser. Data never leaves your device.
How large a JSON file can I process?
Recommended max 5MB. Larger files may cause browser slowdown. Drag-and-drop file upload supported.
How do filter expressions work?
Use [?(@.field==value)] syntax, e.g. $.users[?(@.age>18)] to filter users older than 18. Supports ==, !=, >, <, >=, <= operators.
Can it auto-detect JSON format?
Yes. The tool auto-detects and formats JSON input, with line/column error reporting for invalid JSON.