Remove Duplicate Lines Online Free

Remove duplicate lines from your text instantly. Keep unique lines, preserve order, and optionally trim whitespace. Works entirely in your browser.

Last updated May 2026

Pro Tip

Enable 'Trim whitespace' to catch duplicates that differ only by leading or trailing spaces. Turn off 'Case sensitive' to treat 'Hello' and 'hello' as the same line.
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How to Use Remove Duplicate Lines

1

Enter Your Text

Paste or type text with duplicate lines into the input area.
2

Configure Options

Toggle case sensitivity, whitespace trimming, and empty line removal to customize the behavior.
3

Remove Duplicates

Click 'Remove Duplicates' to process your text and keep only unique lines.
4

Copy the Result

Review the stats and copy the deduplicated text to your clipboard.

Why Use Our Remove Duplicate Lines?

Smart Deduplication

Preserves the first occurrence of each line while removing all subsequent duplicates.

Flexible Options

Control case sensitivity, whitespace handling, and empty line treatment.

Detailed Statistics

See original count, unique lines kept, and how many duplicates were removed.

100% Free

No hidden charges or premium features locked behind paywalls.

Privacy First

Files are processed in your browser and never uploaded to servers.

Works Everywhere

Compatible with desktop, tablet, and mobile browsers.

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