# Array Extractor

Extract elements of specific types from arrays (numbers, strings, booleans, objects, etc.)

> Canonical page: https://elysiatools.com/en/tools/array-extractor

- **Category:** Data Processing

- **Keywords:** array, extract, filter, type, numbers, strings, booleans, objects, separate, classify

## Overview

The Array Extractor is a versatile utility designed to quickly isolate specific data types from mixed-content arrays. Whether you are cleaning messy datasets or filtering raw inputs, this tool allows you to extract integers, floats, strings, or booleans with precision and ease.

## Inputs

- **Input Array** (textarea): Enter array as JSON format: \[3, 1, 2\] or comma-separated values: 3, 1, 2 or one per line
- **Extract Type** (select)
- **Include Null Values (包含Null值)** (checkbox)
- **Include Undefined Values (包含Undefined值)** (checkbox)
- **Case Sensitive (for strings)** (checkbox)
- **Trim Whitespace (for strings)** (checkbox)
- **Custom Separator (for text input)** (text): Enter separator (default: comma, semicolon, or newline)

## When to use

- When you need to separate numerical values from a mixed list of strings and numbers.
- When cleaning raw data inputs that contain unwanted null or undefined values.
- When you need to standardize a list of strings by trimming whitespace and filtering by type.

## How it works

- Paste your data into the input field as a JSON array, comma-separated values, or one item per line.
- Select the specific data type you wish to extract from the dropdown menu.
- Toggle optional settings like 'Include Null Values' or 'Trim Whitespace' to refine the output.
- Click the process button to generate a clean, filtered list of your desired elements.

## Use cases

- Extracting only numerical IDs from a mixed log file containing text and numbers.
- Cleaning a user-submitted form list by removing all null and undefined entries.
- Isolating boolean flags from a complex configuration object array.

## Frequently asked questions

### What input formats are supported?

The tool accepts standard JSON arrays, comma-separated values, or lists where each item is on a new line.

### Can I extract multiple types at once?

No, the tool is designed to extract one specific data type per operation to ensure accuracy.

### How does the tool handle whitespace in strings?

You can enable the 'Trim Whitespace' option to automatically remove leading and trailing spaces from extracted strings.

### Does it support custom separators?

Yes, you can define a custom separator if your input data uses a specific character other than commas or newlines.

### Are my inputs saved on your server?

No, all processing is performed locally in your browser, ensuring your data remains private.

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- [Array Deduplicator](https://elysiatools.com/en/tools/array-deduplicator): Remove duplicate elements from arrays with various deduplication methods
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## Samples

- [Phone Number Extractor Samples](https://elysiatools.com/en/samples/phone-number-extractor): Collection of mixed text containing phone numbers from various countries for extraction testing
- [Changelog Extractor Samples](https://elysiatools.com/en/samples/changelog-extractor): Various changelog formats for testing changelog parsing and extraction tools
- [Markdown Link Extractor Samples](https://elysiatools.com/en/samples/markdown-with-links): Sample Markdown documents with various link types for testing the Markdown Link Extractor tool
- [Copyright-Free MP3 Audio Samples](https://elysiatools.com/en/samples/mp3-samples): Collection of royalty-free audio samples for testing and development purposes including nature sounds, meditation music, and ambient audio

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