Text Tools

Duplicate Line Remover

Strip duplicate lines from any list, fast.

About this tool

Got a messy list with repeated entries? Paste it in and get a clean, de-duplicated version back. Useful for email lists, URL lists, CSV columns, log files — anywhere duplicates creep in.

How to use

  1. Paste your lines.
  2. Choose case-sensitive or case-insensitive matching.
  3. Click Remove Duplicates.

Benefits

  • Case-sensitive or insensitive matching
  • Preserves order
  • Handles huge lists

Real-world use cases

  • Cleaning email lists
  • Deduping log entries
  • Tidying CSV columns

Tips & best practices

  • Use case-insensitive mode for emails
  • Sort alphabetically after deduping for easier review
  • Trim whitespace first for best results

Frequently asked questions

Will it remove blank lines?

Optionally — there's a checkbox to strip blanks.

Does it sort the result?

Only if you ask it to — order is preserved by default.

Is there a line limit?

Tens of thousands of lines work comfortably.

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