Is the original order preserved?

Yes. Lines appear in the order they were first seen.

Does it handle different capitalizations?

Enable 'Case-insensitive' to treat 'Apple' and 'apple' as the same.

Remove Duplicate Lines

Paste a list and keep only the first occurrence of each line. Optional case-insensitive matching and whitespace trim.

Input

Case-insensitive Trim whitespace

Result

How to use Remove Duplicate Lines

Paste your list (one item per line).
Toggle case-insensitive or trim if you need them.
Copy the deduplicated result.

What is Remove Duplicate Lines?

Deduplicating lines is one of the most common cleanup tasks for any list — emails, URLs, names, log entries. This tool walks your text top-down and drops any line that has already appeared, preserving the original order.

FAQ

Is the original order preserved?: Yes. Lines appear in the order they were first seen.
Does it handle different capitalizations?: Enable 'Case-insensitive' to treat 'Apple' and 'apple' as the same.

Related tools

Sort Lines
Remove Line Breaks
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