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Online Duplicate Line Remover

Effortlessly remove duplicate lines from your text, lists, or code with our free online tool. Clean up data instantly with advanced deduplication options.

Input Text
0 lines

How to Remove Duplicate Lines

  1. Paste or type your text below - duplicates will be highlighted
  2. Toggle "Process Duplicates" to enable removal
  3. Adjust advanced options for case sensitivity and sorting
  4. Copy or download your deduplicated text
Paste or type your text here (one item per line)...

Process Duplicates

Currently showing original text

Duplicate Controls

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Original Lines
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Unique Lines
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Duplicates Removed
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Input Length
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Output Length

Features

  • Remove duplicate lines instantly
  • Works with any text or code
  • Case-sensitive or case-insensitive
  • Preserve original line order
  • Sort results alphabetically
  • View removed duplicates
  • Mobile-friendly design
  • Count duplicate occurrences
  • Clean up CSV data
  • Download deduplicated text

Why Remove Duplicate Lines?

  • Clean up mailing lists
  • Deduplicate CSV exports
  • Remove duplicate URLs
  • Clean code snippets
  • Process log files
  • Organize product lists
  • Clean database exports

FAQs

How does the duplicate line remover work?
Our tool scans your text line by line and identifies duplicates. You can choose case-sensitive or case-insensitive matching, and the tool removes all duplicate occurrences, keeping only the first instance of each unique line.
Can I see which lines were removed?
Yes! Enable the 'Show removed duplicates' option in Advanced Options to see a complete list of all duplicate lines that were removed from your text.
Does it preserve the order of my lines?
By default, yes. The tool keeps lines in their original order. You can also choose to sort the output alphabetically if needed.
What's the difference between case-sensitive and case-insensitive?
Case-sensitive treats 'Apple' and 'apple' as different lines, while case-insensitive treats them as duplicates. Choose based on your specific needs.
Is this tool free to use?
Yes! Our Remove Duplicate Lines tool is completely free, with no limits or sign-up required.

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