Array Deduplicator

Array Deduplicator | Online Free Tool | Elysia Tools

Tool usage guide

Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Category: Data Processing
Input types: textarea, select, checkbox, text
Output type: text
Sample coverage: 4
API ready: Yes

Overview

The Array Deduplicator is a powerful utility designed to clean your datasets by efficiently identifying and removing duplicate elements. Whether you are working with JSON arrays, comma-separated values, or newline-delimited lists, this tool provides multiple algorithmic methods to ensure your data remains unique and organized.

When to use

Cleaning raw data exports before importing them into a database or spreadsheet.
Preparing unique lists of identifiers, emails, or tags for marketing campaigns.
Optimizing code performance by removing redundant entries from configuration arrays.

How it works

1Paste your data into the input field using JSON, comma-separated, or newline-separated formats.
2Select a deduplication method, such as the high-performance Set method or the Map Key method for complex objects.
3Adjust optional settings like case sensitivity, whitespace trimming, and order preservation to match your specific data requirements.
4Click the process button to generate a clean, unique list of your original elements.

Use cases

Consolidating user email lists from multiple sources into a single unique mailing list.
Removing duplicate product IDs from inventory exports to prevent database errors.
Cleaning up tag clouds or keyword lists by normalizing case and removing redundant terms.

Examples

1. Cleaning a Marketing Email List

Marketing Specialist

Background

A marketing team merged three separate lead lists, resulting in a file with many overlapping email addresses.

Problem

The list contains duplicates and inconsistent casing (e.g., '[email protected]' and '[email protected]').

How to use

Paste the list, enable 'Trim Whitespace' and 'Case Sensitive', and use the 'Set Method'.

method: set, caseSensitive: false, trimWhitespace: true

Outcome

A clean, unique list of email addresses with consistent formatting, ready for import into an email service provider.

2. Deduplicating Product SKU Codes

Inventory Manager

Background

An inventory export contains thousands of SKU codes, some of which were scanned multiple times during the audit.

Problem

The duplicate SKUs inflate the inventory count and cause discrepancies in the warehouse management system.

How to use

Paste the SKU list as a newline-separated block and select the 'Sort and Filter Method'.

FAQ

What input formats are supported?

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

Can I keep the original order of items?

Yes, enable the 'Preserve Original Order' checkbox to ensure the output maintains the sequence of the first occurrence of each item.

Does it handle case sensitivity?

Yes, you can toggle 'Case Sensitive' to treat 'Apple' and 'apple' as either distinct or identical entries.

How do I handle objects within an array?

Select the 'Map Key Method' to effectively identify and remove duplicate objects based on their structure.

Is there a limit to the number of items I can process?

The tool is designed to handle large datasets efficiently, though performance may vary based on your browser's memory capacity.

method: sort-and-filter, preserveOrder: false

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Learn when to use this tool, what it supports, and how real users apply it.

Key facts

Overview

When to use

How it works

Use cases

Examples

1. Cleaning a Marketing Email List

2. Deduplicating Product SKU Codes

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