Duplicate Line Remover - Remove Duplicate Lines from Text

Use this free duplicate line remover to instantly clean up lists, logs, or CSV data by removing repeated lines. Choose to match case-insensitively and trim extra whitespace to catch near-duplicates too.

How does the Duplicate Line Remover work?

This tool splits your text into individual lines and keeps only the first occurrence of each unique line, discarding the rest while preserving the original order. Optional settings let you treat lines as duplicates regardless of case or surrounding whitespace, which is useful for cleaning messy exported data.