Remove Duplicate Lines
FeaturedPaste a list and instantly remove duplicate lines. Optional trim and case-insensitive matching.
4 unique lines(2 removed)
apple banana cherry Banana
About the Remove Duplicate Lines
Efficiently deduplicate long lists of text by removing exact or case-insensitive duplicates while optionally trimming whitespace. Perfect for cleaning up keywords, email lists, or configuration files.
How to use the Remove Duplicate Lines
- 1Paste your list of lines.
- 2Enable 'Trim whitespace' to handle leading/trailing spaces.
- 3Enable 'Case-insensitive' if 'Apple' and 'apple' should count as duplicates.
- 4Copy your cleaned list of unique lines.
Why people use it
- Remove duplicate email addresses from a newsletter signup export.
- Clean up keyword lists for SEO campaigns.
- Sanitize configuration settings by removing redundant entries.
- De-duplicate log files for easier analysis.
Frequently asked questions
Does it preserve order?
Yes — it keeps the original order of the first occurrence of each unique line.
Can I remove empty lines?
When you have 'Trim whitespace' enabled, empty lines are automatically treated as duplicates and removed.
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