Duplicate Line Remover – First Copy Kept

Pasted a list — keywords, emails, IDs, or log lines — and the same entries keep appearing twice? This free duplicate line remover keeps the first copy of every line and drops every later repeat, wherever it sits in the list. Paste apple, banana, apple, cherry, banana and you get back apple, banana, cherry, in the original order. Everything runs in your browser, so nothing is uploaded, nothing is stored, and no signup is needed.

How to use this duplicate line remover

Three quick steps — no signup, no cost.

1Paste your list

Put one entry per line — an email list, a keyword export, a set of IDs, or a log excerpt.

2Set how strict the match is

Turn on ignore-case or trim-whitespace matching if stray capitals or trailing spaces are hiding duplicates, and sort alphabetically only if order does not matter.

3Copy the clean list

Copy the deduplicated list, with a count of how many lines were kept and how many repeats were removed.

Why this duplicate line remover catches what spreadsheet tricks miss

Duplicates collected from different sources rarely sit next to each other — and that is exactly where simple tools fail.

Repeats caught anywhere

Unlike the command-line uniq, which only folds back-to-back repeats, this tool finds repeats even when other lines sit between the copies.

First copy kept, order kept

The surviving copy keeps the position of its first appearance, so the list comes back identical except that repeats have vanished.

Matching you can tune

Ignore-case treats Apple and apple as the same line, and trim-whitespace ignores stray spaces at the ends of lines before comparing.

Counts you can check

Lines kept, duplicates removed, and total input are shown, so you can verify the cleanup before you paste it onward.

Duplicate Line Remover FAQs

Short, direct answers to the questions readers ask most.

No. It compares whole lines — the full text up to the newline is the unit — so two lines must match end to end to count as duplicates.

The first. Every later repeat is removed, and the surviving lines keep their original first-seen order unless you turn on alphabetical sorting.

Only when ignore-case matching is on. With exact matching they count as different lines, and a trailing space likewise makes two otherwise-identical lines distinct.

The first blank line is kept like any other line, and later blank lines are treated as repeats of it — to strip every blank line, remove them before or after deduplication.

Yes — free, with no account and no signup.