Paste your text and instantly strip all duplicate lines — with options to sort, trim whitespace, and ignore case.
Powerful options to deduplicate, sort, and clean any block of text.
Remove exact duplicates or optionally treat different-case lines as the same.
Sort alphabetically A→Z, Z→A, or by line length after removing duplicates.
See exactly how many duplicates were removed and what percentage you've reduced.
Save your cleaned list as a .txt file with one click — ready to use anywhere.
Paste the text containing duplicate lines into the input area.
Choose whether to ignore case sensitivity, blank lines, and whether to preserve original order.
Click Remove Duplicates and copy the clean, deduplicated text to your clipboard.
This free online remove duplicate lines tool is designed to work entirely in your browser — no uploads, no waiting, no software installation needed. It's fast, private, and completely free to use without any account or subscription.
Paste a mailing list to instantly remove duplicate email addresses.
Remove repeated log entries from server logs to find unique events and error messages.
Clean up SEO keyword lists by removing duplicates before importing them into tools.
Enable case-insensitive mode when 'London' and 'london' should be treated as the same entry.
Removing duplicate lines is a common data cleaning task for developers, data analysts, SEO specialists, and anyone managing large text lists.