Remove Duplicate Lines

A duplicate line remover takes a list — one item per line — and deletes every repeated line, keeping the first occurrence and the original order. Feed it 500 lines with 80 repeats and you get the 420 unique ones back, instantly.

Duplicates creep into every merged list: two exported CSVs of emails, keyword lists combined from several research tools, URL collections from multiple crawls, log excerpts, inventory codes. Spreadsheet dedupe functions work but demand importing, selecting and menu-diving; a paste-and-copy tool does it in five seconds.

Paste your list, and the tool returns it with every duplicate line removed — first occurrence kept, order preserved, and a count of how many lines were dropped so you can sanity-check the result.

Typical jobs: deduplicating an email list before a campaign (repeat sends annoy subscribers and hurt sender reputation), merging keyword lists from several SEO tools into one clean set, cleaning URL lists before submitting or crawling, and tidying any copy-pasted data where the same row slipped in twice. Exact-match comparison means "Apple" and "apple" are treated as different lines — case and spacing count.

Everything runs in your browser; your list is never uploaded, which matters when it contains emails or client data.