Remove Duplicate Lines

Paste your text and instantly remove duplicate lines — copy or download the result.

Case-sensitive matching Ignore leading/trailing whitespace

Questions answered

Frequently asked questions

Everything you might be wondering about the Remove Duplicate Lines.

Does this preserve the original order?

Yes — the first occurrence of each unique line is kept in its original position; later duplicates are removed.

Is it case-sensitive?

You can toggle case-sensitive matching on or off, depending on whether "Apple" and "apple" should count as duplicates.

Is it free and private?

Yes — free, no sign-up, and everything runs in your browser.

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