Remove Duplicate Lines
Remove duplicate lines
Paste a list and this keeps the first occurrence of each line and drops every later repeat, preserving order by default. Turn on trim, ignore case, or sort as needed. It all runs in your browser — nothing is uploaded.
Frequently asked questions
How do I remove duplicate lines?
Paste your list — it keeps the first of each line and removes later repeats. Optionally trim, ignore case, and sort. Runs in your browser.
Does it keep original order?
Yes by default — first occurrence stays in place. Turn on sorting to order the result A–Z instead.
Is my data safe?
Yes — deduplication runs entirely in your browser with JavaScript; nothing is sent to a server.