Remove Duplicate Lines

Remove repeated lines while preserving the first occurrence. Free to use online with no sign-up. Fast and mobile-friendly.

Clean lists, pasted exports and keyword sets with optional trimming and case-sensitive matching.

Example

A repeated line appears only once in the cleaned output.

Frequently asked questions

Is the remove duplicate lines free to use?: Yes. The tool is free to use and does not require an account.
Is my input stored?: For browser-based tools, your input stays on your device. The URL shortener is the exception because short links must be stored to redirect later.