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Remove Duplicate Lines

Remove duplicate lines from any list of text, with options for case sensitivity, trimming, sorting, and removing empty lines.

Runs entirely in your browser — your files are never uploaded to a server.

This tool runs entirely in your browser. Your text is never uploaded to our servers.

How It Works

1. Choose Your File

Drag & drop or select the file you want to work with.

2. Processed in Your Browser

Everything happens locally on your device — your file is never uploaded anywhere.

3. Download Your Result

Get your finished file instantly, ready to save or share.

Frequently Asked Questions

Does it keep the first occurrence of a duplicate?

Yes — the first time a line appears is kept, and later repeats are removed.

Can I ignore capitalization when checking for duplicates?

Yes, toggle "Case sensitive" off to treat "Apple" and "apple" as the same line.

Can I sort the results alphabetically?

Yes, enable "Sort alphabetically" before processing.

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