Duplicate Line Remover
Paste a list of lines — emails, keywords, URLs, log entries — and remove duplicates in one click while keeping the original order.
How to use the duplicate line remover
Paste your list into the box, one item per line, choose your matching options, then click "Remove duplicates." The box updates in place with only the first occurrence of each unique line kept, in its original order, so you can immediately copy the cleaned-up result.
Common uses
Email & contact lists
Clean up a mailing list exported from multiple sources before importing it into an email tool, avoiding duplicate sends.
Keyword research
Merge keyword lists from several tools and strip out repeats before building a content plan.
Log files
Quickly see the unique set of error messages or URLs in a large log export.
URL lists
De-duplicate a list of links gathered from different sources before running a crawl or audit.
Frequently asked questions
Does this keep the first or last occurrence of a duplicate?
The first occurrence of each line is kept, and its original position in the list is preserved (unless you enable sorting).
What does "case-insensitive match" do?
When enabled, "Apple" and "apple" are treated as the same line for deduplication purposes. The version that's kept is whichever occurred first.
Will this remove blank lines even if I only have a few duplicates?
Only if "Remove blank lines" is checked. Leave it unchecked if blank lines are meaningful in your list.