FREE WEB TOOL

Duplicate line remover

Remove duplicate lines while keeping the first occurrence.

Use tool

Text

Ignore leading/trailing spacesIgnore case

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How to use this tool

Remove duplicate lines while keeping the first occurrence.

Set Text, Ignore leading/trailing spaces, Ignore case.
Use Remove duplicates to process the input.
Compare the result with your source data and return to the input to make corrections.

Ignore leading/trailing spaces: Default: on
Ignore case: Default: off

Input and settings example

apple banana apple → apple / banana

Use the whitespace and case options to control which lines count as duplicates.