Duplicate Line Remover
Remove duplicate lines from any text. Keep order or sort alphabetically.
Input
Output
Remove Duplicate Lines Online
Instantly remove repeated lines from any block of text. Paste email lists, log files, keywords, or any multi-line content and get only unique lines back. Case-insensitive matching and whitespace trimming ensure thorough de-duplication even on imperfect datasets.
Options Explained
- Trim whitespace — strips leading and trailing spaces before comparing lines, so " hello " and "hello" are treated as duplicates.
- Case-insensitive — makes "Apple", "apple", and "APPLE" count as the same line.
- Remove empty lines — removes blank lines from the output in addition to duplicate lines.
Common Uses
- Deduplicating email or mailing lists before a campaign
- Cleaning keyword lists for SEO or PPC ads
- Removing repeated log entries from exported files
- Merging two lists and removing overlap