it365 Toolbox

JSON Array Field Extractor & Filter

Quickly filter specific fields from complex object array JSON to get JSON data with only the required fields

1. Input JSON Data
Import File Show Example Clear

📄 File Loaded: {{ fileName }}

Size: {{ fileSize }} | Re-enter

2. Select Fields to Extract {{ selectedFields.length }} / {{ availableFields.length }}
Select All Clear Restore Defaults
{{ field }}
3. Processing Result {{ resultCount }} items
📋 Copy JSON 💾 Download File
{{ displayJson }}

* Note: The result is long. Only the first 10,000 characters are displayed. Click "Copy" or "Download" to get the full data.

📥

Release to import JSON file

🚀 How to Extract Specific Fields from a JSON Object Array

In daily development, we often need to extract specific fields from large JSON object arrays. For example, a backend API returns a user list with 50 fields, but you only need id and username to generate a dropdown. Manually writing scripts or deleting fields one by one is tedious and error-prone. 😫

💡 Steps and Methods:

  1. 📥 Input Data: Paste your JSON string into the input box, or drag and drop the .json file directly onto the page.
  2. 🔍 Parse Fields: The program will automatically parse the keys of the first object in the array and display them as tags.
  3. ✅ Check Filters: Check the fields you want to keep. This tool will automatically pre-select common fields like id, name, value.
  4. ✨ Get Results: The processed results will be displayed in real-time below. You can copy or download the streamlined JSON file with one click.

🛠️ JSON Objects Have Many Fields, I Only Want Some. How to Quickly Process a Simplified JSON?

When facing complex nested data or redundant fields, how to extract a subset of fields from a JSON array becomes key to improving efficiency. This tool is designed to solve this pain point, especially suitable for the following scenarios:

  • 🎯 How to filter out the data I want from a JSON object array: Complete complex field filtering tasks with just a few clicks.
  • 🧹 Data Cleaning: Remove redundant fields, reduce data transmission volume, and optimize frontend performance.
  • 🔄 Format Conversion: Quickly convert complex object arrays into streamlined versions containing only core attributes.

🌟 Features and Characteristics of the JSON Array Field Filter Tool

This is a tool born to enhance developer happiness, featuring the following core advantages:

  • 🖱️ Visual Operation: No need to write any code or regex, what you see is what you get.
  • 🤖 Smart Pre-selection: Automatically recognizes and checks common field names like id, name, label, value, key, etc.
  • ⚡ Large File Support: Deeply optimized logic for handling large data volumes, supporting the processing of huge JSON files with tens of thousands of lines without lagging.
  • 📂 Multiple Import Methods: Supports direct pasting, clicking to import, and more intuitive drag-and-drop import.
  • 💾 Result Export: Supports one-click copying of results to the clipboard, or direct download as a .json file for subsequent use.

Whether you want to extract a subset of fields from a JSON array or need to filter out desired data from a JSON object array, this tool provides an ultimate efficiency experience. 🌈