Remove Duplicate Emails

Paste a list and get a clean, deduplicated set of email addresses instantly. Free, private and \ processed entirely in your browser.

Paste your list of emails

Remove duplicate email addresses from any list instantly. Free and processed entirely in your browser.

How it works

1

Paste your list

Add your emails, one per line or comma-separated.

2

Choose options

Ignore case and sort the output if you want.

3

Deduplicate

Get a clean list with duplicates removed and counted.

4

Verify & send

Verify the clean list before your next campaign.

Clean lists, better outreach

Merged exports and scraped lists are full of duplicates. Sending to the same address twice in a campaign wastes sends and raises complaint rates.

This free tool deduplicates any list in your browser, keeping the first occurrence of each address and telling you exactly how many duplicates it removed.

Deduplicate, then verify

Removing duplicates gives you an accurate list — but some of those addresses may still be invalid or risky to send to.

Run the cleaned list through Emailchaser's free email verifier to cut bounces and protect your sender reputation before you send.

Common questions about removing duplicate emails

How do I remove duplicate email addresses from a list?


Paste your list above — one email per line, or separated by commas — and click remove duplicates. The tool keeps the first occurrence of each address and strips the rest, then shows how many duplicates it removed.

Does it ignore differences in capitalization?


By default, yes. Email addresses are case-insensitive on the part before the @, so 'John@x.com' and 'john@x.com' are treated as the same. You can turn this off if you need exact matching.

Why remove duplicate emails before sending?


Emailing the same person twice in one campaign looks careless and can increase spam complaints. Deduplicating also gives you an accurate count of your real audience.

Is the tool free and private?


Yes — it's free, needs no signup, and runs entirely in your browser, so your list is never uploaded.

Ready to 10x your pipeline?

Send your first cold email campaign today, risk-free.

Try for free