Jenee

Line Deduplication

Remove duplicate lines from text at once. Useful for list cleaning and data cleansing.

How to Use

  1. STEP 1
    Paste the text you want to deduplicate into the input area
  2. STEP 2
    Duplicate lines will be removed automatically
  3. STEP 3
    Copy the result for use
  • Input text is processed only in your browser and not sent to any server
  • Blank lines and leading/trailing spaces are treated as distinct
  • Processing may take time for large data sets

Tips & FAQ

  • QUESTION 1

    When would you use this?

    It's widely used for cleaning up email or ID lists, data cleansing, and duplicate checks.

  • QUESTION 2

    Is the original order preserved?

    Yes, the first occurrence is kept and order is preserved.

  • QUESTION 3

    Are case and whitespace differences treated as unique?

    Yes, lines are compared exactly. Preprocess if you need case-insensitive deduplication.