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Remove Duplicate Lines

Remove duplicate lines from any text block instantly. Optionally sort remaining lines alphabetically.

100% Private Browser-Based Free Forever

Input (with duplicates)

Output (unique lines)

Case-insensitive Sort after

How to Use Remove Duplicate Lines

Paste your text with duplicate lines

Click "Remove Duplicates"

Copy the clean result

Why Use This Tool

100% Private

Your data never leaves your browser. Nothing is uploaded to any server.

Instant Results

Modern browser APIs deliver results in milliseconds with no waiting.

Free Forever

No subscriptions, no credits, no paywalls — ever.

Frequently Asked Questions

Is comparison case-sensitive?

You can toggle case-sensitivity on or off.

Can I sort the remaining lines?

Yes — sort alphabetically after removing duplicates.

Does it handle empty lines?

You can choose to keep or remove empty lines.

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