Is the original order preserved?

Yes — the first occurrence of each line stays in place; only later repeats are removed. Use the Sort Lines tool afterwards if you want alphabetical order.

How large a list can I paste?

Comfortably hundreds of thousands of lines — everything runs locally in your browser, so there's no upload limit.

Remove Duplicate Lines

Clean up lists by removing duplicate lines in one click. Paste any text and get back only unique lines, preserving the original order of first appearance. Options let you trim surrounding whitespace before comparing and treat lines that differ only in letter case as duplicates. The tool reports exactly how many duplicates were removed.

Text Tools

Input (one item per line)

Trim whitespace before comparingIgnore caseRemove empty lines

Unique lines

Private by default

This tool runs entirely in your browser. Your data is never uploaded to a server.

How to use

3 clear steps.

Paste your list or text (one item per line).
Choose whether to ignore case or trim whitespace when comparing.
Copy the deduplicated result.

Good to know

Frequently asked questions

Is the original order preserved?: Yes — the first occurrence of each line stays in place; only later repeats are removed. Use the Sort Lines tool afterwards if you want alphabetical order.
How large a list can I paste?: Comfortably hundreds of thousands of lines — everything runs locally in your browser, so there's no upload limit.