Free tool
CSV deduper
Drop in a CSV and remove duplicate rows by email or any column. Everything runs in your browser, so your data is never uploaded.
Why lead lists fill up with duplicates
Every export from a database, a scraper, or an old campaign overlaps with the last one. Merge a few files in a spreadsheet and the same person shows up three times with three different statuses.
This tool fixes one file fast. Pick the email column, and it keeps the first row for each unique address, trims stray whitespace, and drops rows with no email at all.
If deduping is a weekly chore, Miniloop does it automatically: every CSV you import is deduped against the leads you already have, so you keep one living list instead of a folder of exports.
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CSV deduper FAQ
Tired of deduping by hand?
Miniloop dedupes every import automatically and enriches each lead with verified emails and company data. Free plan, no credit card.