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Text & Writing Utilities · Free tool

Remove Duplicate Lines

Paste text, remove duplicate lines with one click. Options for case sensitivity and whitespace handling.

Updated April 2026
Keep:

Original

8

Deduped

5

Removed

3

Output

What it does

Paste a list of lines and strip duplicates in one click. Options let you keep first or last occurrence, preserve original order, ignore case, and trim whitespace before comparison. Stats show original line count, deduped count, and how many duplicates were removed.

Great for cleaning email lists, log files, imported CSVs, and any messy text dump. For reordering lines see text sorter; for line comparisons, diff checker.

How to use it

  1. Paste your list into the input textarea.
  2. Toggle case sensitivity, trim whitespace, and keep-first/keep-last as needed.
  3. Click Remove duplicates.
  4. Copy the deduped output.