Duplicate Line Checker

Clean up your data effortlessly. Paste your text to find, analyze, and remove all duplicate lines, leaving you with a perfectly unique list.

Check Your Text How it works

Duplicate Line Analyzer

How to Find and Remove Duplicate Lines

  1. Paste Your Text — Enter the text you want to check into the input box. Each new line is treated as a separate entry.
  2. Choose Your Options — Select "Case-sensitive" if you want to treat "Apple" and "apple" as different lines.
  3. Click "Find Duplicates" — The tool will process your text.
  4. Review the Results — See a table of all lines that appeared more than once and their counts. A second box will contain your original text with all duplicate lines removed, ready to copy.

Practical Uses for This Tool

Cleaning Data Lists

Quickly remove duplicate entries from email lists, user lists, phone numbers, or any other data set.

Log File Analysis

Identify repeated error messages or events in log files to help with debugging and analysis.

SEO & Keyword Lists

Ensure your keyword lists are unique before using them in marketing campaigns or content creation.

Programming

Remove duplicate lines from code, configuration files, or data arrays.

Frequently Asked Questions

Clean up your lists in seconds.

Remove duplicate entries from any text or list to ensure your data is clean and unique.

Analyze Your Text