WordBench tool
Remove Duplicate Lines
Delete repeated lines from a list and keep only the unique ones.
About the remove duplicate lines
The WordBench duplicate line remover strips repeated lines out of a list and keeps only the first occurrence of each, in the original order. Paste a column of emails, tags, URLs, or any line-based data and get a clean, unique set back at once.
Duplicates creep into lists whenever data is merged, exported, or copied by hand. Cleaning them out by eye is slow and error prone past a few dozen rows. This tool compares every line against the ones before it and drops the repeats, so a list of thousands is deduplicated instantly.
You can choose to ignore case, so Globex and globex are treated as the same entry, and to trim surrounding whitespace, so a stray leading space does not make two identical lines look different. Order is always preserved, which matters when a list is already sorted the way you want it.
Who uses it
Worked example
Paste four lines: acme, globex, Acme, globex.
With the defaults, the two exact globex lines collapse into one and you get acme, globex, Acme. Turn on ignore case and Acme is treated as a repeat of acme too, leaving just acme and globex. The first spelling you typed is the one that stays.
Frequently asked questions
Does it keep the first or last copy of a duplicate?
It keeps the first occurrence and removes every later repeat, preserving the original order of the list.
Can it ignore differences in capitalization?
Yes. Enable ignore case and lines that differ only in letter case are treated as duplicates, so Report and report collapse into one.
What does trim whitespace do?
It ignores leading and trailing spaces and tabs when comparing lines, so a line with an accidental trailing space is still recognized as a duplicate of the same text without it.
Does it sort the list?
No. Deduplication leaves your order intact. If you also want the list sorted, run it through the sort lines tool afterward.