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Text Utilities

Duplicate Line Remover

Paste any list of lines and instantly remove duplicates, keeping the first occurrence of each. Optionally trim whitespace and blank lines, sort the result alphabetically, or dedupe case-insensitively. Useful for cleaning up email lists, tag lists, or any line-based data.

  • Nothing leaves your device
  • Runs entirely in your browser
  • Free, no account needed
Use Duplicate Line Remover - free

Frequently asked questions

Which occurrence is kept when duplicates are found?

The first occurrence of each unique line is kept; later duplicates are removed.

Can it ignore capitalization when checking for duplicates?

Yes - enable "Case-insensitive dedupe" to treat "Example" and "example" as the same line.

Can it sort the result too?

Yes, enable "Sort alphabetically" to sort the deduplicated list before displaying it.

Remove duplicate lines instantly - free.

Open Duplicate Line Remover
  • Nothing leaves your device
  • No upload required
  • No account needed
  • Unlimited use, always free

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Whitespace and Line-Break Trimmer

Clean up messy text by trimming extra spaces and blank lines.