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  3. Remove Duplicate Lines

Remove Duplicate Lines

Remove duplicate lines from text

Related Tools

  • Remove Empty Lines - clean blank lines
  • Line Sorter - sort and dedupe
  • Diff Checker - compare results
  • String Length - count lines

How to Use Remove Duplicates

  1. Paste your lines

    Enter or paste multiple lines of text into the input field.

  2. Deduplicate automatically

    See duplicate lines removed, keeping only unique entries.

  3. Copy the result

    Click Copy to save the deduplicated lines to your clipboard.

Frequently Asked Questions

Is the Duplicate Line Remover free to use?
Yes, the Duplicate Line Remover is completely free with no limitations. Remove duplicates from as many lines as you need without any registration or restrictions.
Is my text data private?
Yes, all processing happens locally in your browser using JavaScript. Your data is never sent to any server, making it safe to process sensitive lists like email addresses, customer data, or confidential records.
What does the Duplicate Line Remover do?
The tool scans your text line by line and removes duplicate entries, keeping only unique lines. It can preserve the original order of first occurrences or sort the results alphabetically.
What are common uses for removing duplicate lines?
Removing duplicates is essential for cleaning email lists, deduplicating database exports, processing log files, cleaning up CSV data, merging lists from multiple sources, and preparing data for analysis.
Can I choose whether the comparison is case-sensitive?
Yes, you can toggle case sensitivity. With case-insensitive mode, 'Apple' and 'apple' are treated as duplicates. This is useful when cleaning data where capitalization may be inconsistent.