Is this case-sensitive?

Yes, "Apple" and "apple" are treated as different lines; convert to one case first if you need case-insensitive deduplication.

Duplicate Line Remover

Paste a list of lines to remove duplicates while preserving the original order of first occurrences.

Inputs

Results

Try an example

Formula

Keeps the first occurrence of each unique line, in original order

How Find-and-Replace, Duplicate Removal, and Text Truncation Work

The logic behind common text editing tools — literal replacement, first-occurrence deduplication, and word-boundary truncation.

Word Counter

Count words, characters, and sentences in a block of text.

Text Case Converter

Convert text to uppercase, lowercase, title case, or sentence case.

Palindrome Checker

Check whether a word or phrase reads the same backward as forward.

Text Reverser

Reverse the characters of any text.

Slug Generator

Convert text into a URL-friendly slug.

Character Frequency Counter

Count how often each character appears in a block of text.