Remove Duplicate Lines
Remove duplicate lines from any list, log, or text file.
Result...What is line deduplication?
Line deduplication removes repeated lines from a list, keeping only the first occurrence. Useful for cleaning up email lists, removing duplicate URLs, sorting log files, and preparing unique keyword lists.
Common use cases
- Cleaning up keyword lists for SEO
- Removing duplicate emails or usernames
- Deduplicating log files
- Preparing unique URL lists
Privacy
Everything runs in your browser. Nothing is uploaded.
Frequently Asked Questions
What does this tool do?
Removes duplicate lines from your text, keeping only the first occurrence of each unique line.
What does case-sensitive mean?
If enabled, 'Apple' and 'apple' are treated as different. If disabled, they're treated as duplicates and only the first is kept.
Does it preserve the original order?
Yes. Lines appear in the order of their first occurrence.
Can it handle large files?
Yes, up to a few MB. Runs instantly in your browser.
Is my data uploaded?
No. Everything runs in your browser.