Duplicate Line Remover

Quickly eliminate repeated lines from any list or text. Keep only unique entries with a single click.

Input Text
Cleaned Result

How to Use Duplicate Line Remover

1
1

Paste your list or text into the input box.

2
2

Choose matching options (case sensitivity, whitespace).

3
3

Select whether to keep the first or last occurrence of duplicates.

4
4

Copy or download the cleaned result.

Key Features

Instantly removes duplicates as you configure options
Flexible matching with case and whitespace options
Shows exactly how many duplicates were removed
Works entirely in your browser — nothing is uploaded

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01

What is a Duplicate Line Remover?

A Duplicate Line Remover is a text utility that scans through each line of your input and removes any line that has already appeared before. The result is a clean list where each item appears exactly once, saving you the tedious task of manually scanning for and deleting repeats.
02

When is this tool useful?

This tool is invaluable when working with exported data, URLs, email lists, or any collection that may contain repetitions. It's frequently used by developers cleaning up log files, marketers deduplicating contact lists, and writers organizing research notes.

Frequently Asked Questions

Yes, by default 'Apple' and 'apple' are treated as different lines. You can enable 'Ignore Case' to treat them as duplicates.
No. The original order of non-duplicate lines is preserved. Only redundant lines are removed.
Completely. All processing happens locally in your browser using JavaScript. Your data is never sent to any server.