Duplicate Remover
Clean your keyword lists, email lists, or datasets. Remove duplicates instantly.
Remove duplicate lines from a list
Paste a list — keywords, email addresses, URLs, product codes — and get back one copy of each line. Order is preserved: the first occurrence stays where it was, later repeats are dropped.
It runs in your browser, which matters when the list is a customer export you should not be uploading to a random website.
Where duplicate lines come from
- Merged keyword exports. Pulling from two research tools always overlaps, and duplicate keywords inflate volume totals.
- Combined mailing lists. Duplicates mean a subscriber gets the same message twice, which is the fastest way to earn a spam complaint.
- Log and scrape output. Repeated URLs from a crawl that followed several paths to the same page.
- Copy-paste across spreadsheets. Rows pasted twice when a selection was slightly off.
Exact matching, and why that matters
Matching is exact and character-for-character. "[email protected]" and "[email protected]" are two different lines here, as are "seo tool" and "seo tool" with a double space, and any pair that differs only by trailing whitespace.
That is deliberate — guessing at what "the same" means would silently delete data. If you want case and spacing ignored, normalise first: run the list through the case converter to lowercase it, then the text cleaner to collapse extra spaces, then dedupe.
Before you dedupe a mailing list
Removing duplicate rows is not the same as removing duplicate people. [email protected] and [email protected] deliver to the same inbox but are different strings, and Gmail ignores dots entirely, so [email protected] and [email protected] are one mailbox.
Line deduplication catches the obvious repeats. Anything beyond that needs address normalisation in whatever platform actually sends the mail.