Is my customer list or email data secure?

Yes. All data processing occurs 100% in your local web browser with zero server transmission.

Updated: August 2026 • Verified v1.2

List Deduplicator, Sorter & Text Cleaner

Developer ToolsHigh Usage

Local Browser Execution: Your input is processed locally in your browser and is not sent to UTL servers.

Set-Based Unique Filter: Array.from(new Set(tokens)).sort()

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Understanding Your Results

Removes duplicate items, shows original vs unique count, and exports in line-by-line, comma-separated, quoted CSV, or JSON array format.

Practical Guidance & Next Steps

Toggle 'Case Sensitive' if IDs or tokens require exact casing preservation.

What is this?

A data cleaning utility that removes duplicate entries, cleans whitespace, and reformats lists into structured formats.

How does it work?

1. Paste raw list into the editor. 2. Choose options: remove duplicates, trim whitespace, sort (A-Z or numerical). 3. Export as Clean Lines, Comma-Separated CSV, Quoted CSV, or JSON Array in 1 click.

Why use it?

Cleans customer lists, keyword research data, and code tokens in seconds.

Technical Scope & Calculation Limitations

Processes lists up to 100,000 items in local browser memory.

Frequently Asked Questions

Yes. Select 'JSON Array' as the output format to instantly get formatted JSON.

Windows Desktop & Widget Options

Want this capability on your Windows desktop?

All Windows widgets

Desktop App

9.8/10

DevToys — Swiss Army Knife for Developers

Free open-source offline desktop app for Windows featuring 30+ formatters, converters, and hash tools.

FreeEasy InstallLow RAM

By Etienne Baudoux (DevToys Team)View Widget

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