Remove Duplicate Lines

Remove duplicate lines from text input with options for case sensitivity and whitespace trimming.

Advanced Options

Sample Data

ℹī¸ About Duplicate Removal

This tool helps you clean up text files by removing duplicate lines:

  • Perfect for cleaning lists, logs, and data files
  • Case-sensitive option preserves case differences
  • Whitespace trimming removes leading/trailing spaces
  • Preserves original order when enabled
  • Shows statistics about the reduction achieved

How to use Remove Duplicate Lines

  1. 1
    Paste text — Enter or paste text with duplicate lines.
  2. 2
    Configure options — Set case sensitivity, whitespace trimming, and other options.
  3. 3
    Remove duplicates — Click to process and remove duplicate lines.
  4. 4
    Copy results — Copy the cleaned text for your use.

The Remove Duplicate Lines tool runs entirely in your browser — your data never leaves your machine. Perfect for data cleaning and deduplication tasks.