Remove Duplicate Lines Online

Eliminate repeated lines from your text data. Clean up lists, logs, and datasets instantly.

🧹 Remove Duplicate Lines

How to Remove Duplicate Lines

1

Paste Text

Enter or paste text with duplicate lines. Each line is treated as a separate item.

2

Click Remove

Press the button to instantly find and eliminate all duplicate lines.

3

Get Clean Text

View unique lines count, duplicates removed, and copy the cleaned text.

Clean Your Data From Duplicates

Duplicate content is a common problem when working with data lists, email addresses, log files, CSV data, search results, or any text-based datasets. Manually finding and removing duplicates is tedious and error-prone, especially with large datasets containing hundreds or thousands of lines.

Our duplicate remover processes your text line by line, keeping the first occurrence of each unique line and removing all subsequent duplicates. The original order of unique lines is preserved, so your data structure stays intact while duplicates are eliminated.

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One-Click Clean

Remove all duplicates instantly without manual searching or complex formulas.

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Statistics

See exactly how many duplicates were found and removed from your text.

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Order Preserved

First occurrences are kept in their original order. No data rearrangement.

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Clean Email Lists

Perfect for deduplicating email lists, contact databases, and mailing lists.

Common use cases include cleaning email subscriber lists, removing duplicate entries from spreadsheet exports, deduplicating search results, cleaning up log files for analysis, and preparing unique keyword lists for SEO campaigns. Our tool handles all these scenarios efficiently and accurately.

Frequently Asked Questions

Is the comparison case-sensitive?
Yes, comparisons are case-sensitive. "Hello" and "hello" are treated as different lines. To make them match, first convert your text to the same case using our Case Converter tool.
Does whitespace matter?
Lines are compared exactly as entered, including leading and trailing whitespace. Make sure your lines are consistently formatted for best results.
Can I handle large datasets?
Yes, you can process text up to 50,000 characters, which typically handles thousands of lines. For extremely large files, consider splitting them into chunks.

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