Free Tool

Remove Duplicates

Clean your email list by removing duplicate addresses. Paste your list and get a deduplicated, sorted result with stats.

Paste Your Email List

One email per line, or separated by commas or semicolons

How It Works

How to Use Remove Duplicates

Paste your email list into the text area. Supports one-per-line, comma-separated, or semicolon-separated entries.

Click the button to instantly remove all duplicate entries and get a count of originals versus duplicates.

Copy the deduplicated and sorted list to your clipboard, ready to import into your email platform.

Features

Treats uppercase and lowercase as identical so John@Example.com and john@example.com are correctly merged.

Automatically trims leading and trailing spaces from each entry before comparing for duplicates.

Shows total entries, unique count, and number of duplicates removed so you can measure list quality.

Runs entirely in your browser with no server round-trip, delivering results in milliseconds even for large lists.

Handles lists of thousands of entries with ease, supporting newline, comma, and semicolon delimiters.

Your email list never leaves your browser. No data is uploaded, stored, or shared with any third party.

Use cases

Clean subscriber lists before campaigns to avoid sending duplicate emails and inflating send counts.

Merge prospect lists from multiple sources and remove overlapping contacts before CRM import.

Quickly deduplicate datasets exported from spreadsheets, databases, or CSV files for accurate reporting.

Consolidate RSVP and registration lists to get an accurate unique attendee count.

Sign up for a free Tomba account to unlock bulk processing, API access, CRM integrations, and 75 free searches per month.

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