// free tool
Remove Duplicates
Clean your email list by removing duplicate addresses. Paste your list and get a deduplicated, sorted result with stats.
Sign up for 25 free search credits every 30 days, no credit card required.
One email per line, or separated by commas or semicolons
// how it works
How to use Remove Duplicates
- 01
Paste your list
Paste your email list into the text area. Supports one-per-line, comma-separated, or semicolon-separated entries.
- 02
Deduplicate
Click the button to instantly remove all duplicate entries and get a count of originals versus duplicates.
- 03
Copy clean list
Copy the deduplicated and sorted list to your clipboard, ready to import into your email platform.
// features
Why use Remove Duplicates
Case insensitive
Treats uppercase and lowercase as identical so John@Example.com and john@example.com are correctly merged.
Whitespace handling
Automatically trims leading and trailing spaces from each entry before comparing for duplicates.
Count statistics
Shows total entries, unique count, and number of duplicates removed so you can measure list quality.
Instant processing
Runs entirely in your browser with no server round-trip, delivering results in milliseconds even for large lists.
Bulk support
Handles lists of thousands of entries with ease, supporting newline, comma, and semicolon delimiters.
Privacy first
Your email list never leaves your browser. No data is uploaded, stored, or shared with any third party.
// use cases
Who uses Remove Duplicates
Email marketers
Clean subscriber lists before campaigns to avoid sending duplicate emails and inflating send counts.
Sales ops teams
Merge prospect lists from multiple sources and remove overlapping contacts before CRM import.
Data analysts
Quickly deduplicate datasets exported from spreadsheets, databases, or CSV files for accurate reporting.
Event organizers
Consolidate RSVP and registration lists to get an accurate unique attendee count.