Does it consider case when checking for duplicates?

By default it compares exact matches, which is case-sensitive — "Apple" and "apple" are treated as different lines unless you specifically want case-insensitive matching.

Does it preserve the original order of remaining lines?

Yes, the first occurrence of each unique line is kept in its original position, with later repeats removed.

Will it remove lines that are similar but not identical?

No, only exact duplicate lines are removed — near-matches with minor differences are left as separate lines.

Does Remove Duplicate Lines upload my files to a server?

No. Remove Duplicate Lines runs entirely in your browser using on-device processing, your files never leave your device.

Remove Duplicate Lines

Delete repeated lines from a list or block of text.

Runs in your browser

Input

Case sensitive

About this tool

A list with repeated entries — merged data, a log file, a combined export — needs those duplicates removed before you can trust its count or use it as a clean reference list, and doing that by eye across a long list is unreliable. This tool deletes repeated lines from a list or block of text, giving you a clean, deduplicated result instantly.

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