Remove Duplicate Lines
Remove all duplicate lines from a list or text block instantly.
About Remove Duplicate Lines
Remove Duplicate Lines deletes repeated lines from a list and keeps the first occurrence, preserving the original order. It is the quick cleanup for exports, keyword lists and log captures.
Case sensitivity and surrounding whitespace are configurable, because Email@x.com and email@x.com are often the same entry.
How to use Remove Duplicate Lines
- 1
Paste the list
One item per line; large lists are fine.
- 2
Choose comparison rules
Ignore case and trim spaces if the duplicates differ only by formatting.
- 3
Copy the result
The first occurrence stays in place, so the original ordering survives.
Questions about Remove Duplicate Lines
Does it keep the first or last occurrence?
The first. Ordering is preserved, which matters when the list is ranked.
Are blank lines removed?
Only if you enable that option; otherwise empty lines are treated as duplicates of each other.
Is it case-sensitive by default?
Yes — enable ignore-case to merge Apple and apple.
Is my list uploaded?
No, deduplication runs in the browser.
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Last updated November 2026. Files are processed on FilePlume's own hardware and deleted within 60 minutes; nothing is used for training.