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How to Remove Duplicate Email Addresses

Published: Oct 19, 2026 | Updated: Oct 19, 2026 | About (Japanese)

Key points
  • Paste addresses
  • Ignore case
  • Copy

Steps

  1. Paste email addresses into Remove Duplicate Lines and Sort a List, one per line.
  2. Tick "Ignore case when finding duplicates".
  3. Copy the result without duplicates.
Take care when the list contains personal information.
Use "Remove Duplicate Lines and Sort a List" (free)

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