Remove Duplicate Lines — Free Online Tool

Clean any list by removing repeated lines while keeping the original order. Very handy for email lists, keyword lists, URLs and CSV columns that got duplicated during copy-paste.

Save this tool Keep it in your list and reopen your work later — no sign-up, nothing uploaded.

My saved items

How to use Remove Duplicate Lines

Paste your list, one item per line.
Choose whether to ignore letter case.
Click Remove Duplicates and copy the clean list.

Frequently asked questions

Does it sort my list?

No, the original order is preserved. Only the later repeats are removed.

Your privacy is protected

This tool runs entirely inside your browser. No file, text or number you enter is ever sent to our servers, stored, or shared. Close the tab and everything is gone.

Related tools

Word Counter

Count words, characters, sentences and paragraphs in your text instantly. Writers, stude…

Case Converter

Convert any text to UPPERCASE, lowercase, Title Case, Sentence case or aLtErNaTiNg case …

Text Reverser

Reverse your text by characters, words or lines. Useful for puzzles, creative usernames,…

Find and Replace Text

Replace every occurrence of a word or phrase in large blocks of text. Great for updating…

Lorem Ipsum Generator

Generate placeholder paragraphs for website mockups, print layouts and app designs. Choo…

URL Slug Generator

Turn any title into a clean, SEO-friendly URL slug. Removes special characters, converts…