TetraKits
The TetraKits Duplicate Line Remover runs entirely in your browser — free, private, and ready on mobile or desktop.
Overview
Email marketing lists, SEO keyword exports, and server log extracts all accumulate duplicates. Paste the list, toggle case sensitivity, and get a clean unique set — faster than UNIQUE() in a spreadsheet for one-off cleanup.
How to use the duplicate line remover
Paste text with repeated lines to remove duplicates instantly — keep the first occurrence of each line with optional case-sensitive matching and copy the clean result.
Common use cases
Paste text with repeated lines to remove duplicates instantly — keep the first occurrence of each line with optional case-sensitive matching and copy the clean result. Bookmark the tool for quick access during projects.
FAQ
Which duplicate is kept?
The first occurrence of each unique line is kept; subsequent duplicates are removed.
Does it work on CSV data?
It deduplicates whole lines. For column-level dedup, split columns first or use a spreadsheet.
Are blank lines removed?
Duplicate blank lines collapse to one unless you trim them separately.
Can I deduplicate thousands of lines?
Yes. Browser performance handles large lists; very large files may take a moment.
Is this duplicate line remover free?
Yes. Unlimited use with no signup.
