Duplicate Line Remover

It removes repeated lines from pasted text while keeping the first occurrence of each unique line. If a list contains apple, banana, apple, and cherry on separate lines, the output keeps apple, banana, and cherry and removes the second apple.

Yes. The tool keeps the first time each unique line appears and removes later repeats. It does not alphabetize or rearrange your list unless a separate sorting option is added elsewhere. This is useful for ranked lists, priority lists, chronological data, and keyword exports where order matters.

Case-sensitive removal treats Apple, apple, and APPLE as different lines. Case-insensitive removal treats them as the same value and keeps only the first occurrence. Use case-insensitive mode for emails, keywords, and general lists. Use case-sensitive mode for code, IDs, product SKUs, or data where capitalization has meaning.

Whitespace trimming removes accidental spaces or tabs at the start and end of each line before comparison. Without trimming, "apple" and "apple " may be treated as different lines. Trimming is recommended for copied data from PDFs, spreadsheets, web pages, email tools, and exports.

Yes. Paste one email address per line, enable trimming, and use case-insensitive matching. This catches duplicates such as User@example.com and user@example.com. Always review the output before sending campaigns, and follow your email platform’s compliance and unsubscribe rules.

Yes. Keyword exports from multiple SEO tools often overlap. Paste the combined keyword list, trim whitespace, and use case-insensitive matching to create a clean list for clustering, mapping, or import into another SEO workflow.

It can remove duplicate CSV rows when each row is on its own line. It does not parse complex CSV fields like a spreadsheet application would, so quoted commas and multi-line fields should be handled carefully. For simple row-level deduplication, it works well.

There is no server-side upload limit for normal browser-based use, but very large lists depend on your device memory and browser performance. Tens of thousands of lines should be fine on most modern devices; extremely large files may be smoother if split into chunks.