1. Paste or drop
Copy a column out of Google Sheets, HubSpot, a scraped list or a CSV export. Anything that contains addresses works.
Clean and verify a messy email list in 30 seconds.
Paste a column from your CRM or drop a CSV. ListSweep removes duplicates, fixes
gmial.com typos, flags role and disposable addresses, and checks real
MX records so you stop paying for bounces. Your list is never uploaded.
- Free for the first 100 addresses
- No account, no tracking pixels
- Exports a ready-to-send CSV
Clean & verify
Paste addresses (one per line, or anywhere in the text) or drop a .csv / .txt file.
Drop a file or click to browse
.csv / .txt · processed locally, never uploaded
Nothing is sent anywhere except DNS lookups to a public resolver.
Checking mail servers…
Results
0Unique addresses
0Send-ready
0Duplicates
0Undeliverable
0Risky
0Typos fixed
| Address | Domain | Mail server | Issues | Keep |
|---|
Your list is longer than the free limit
We cleaned the first 100 addresses. Unlock once for $19 to process unlimited lists — lifetime access, no subscription.
How it works
2. Clean locally
Duplicates, casing, stray punctuation, Gmail dot/+tag aliases and common domain typos are normalised right in your tab. No upload, no queue.
3. Check the mail server
For each domain we ask a public DNS resolver for its MX records. No MX record means no inbox can exist — those addresses get cut.
What it catches
- Duplicates — including
jane.doe@gmail.comvsjanedoe+news@gmail.com - Typos —
gmial.com,hotmial.com,outlok.comand ~20 more - Dead domains — domains that do not exist or accept no mail
- Disposable inboxes — mailinator, yopmail, 10minutemail and 80+ more
- Role addresses — info@, sales@, noreply@ that wreck reply rates
- Malformed rows — missing TLDs, double dots, trailing punctuation
Pricing
Pay once. No subscription, no per-seat pricing, no "contact sales".
Free
$0
- Up to 100 addresses per list
- Dedupe, typo fixes, disposable & role detection
- MX verification
- Clean list CSV export
Pro one-time
$19
- Unlimited addresses
- Full report CSV with every issue per address
- Works offline after first load
- Lifetime access, no account required
Secure checkout · card, Apple Pay, Google Pay
Email list cleaning guides
Short, practical answers to the things that actually go wrong with a list.
- Why is my cold email bounce rate high? The five causes, ranked by how much they cost you.
- Your list bounced 30% — what to do first Triage order, and why you stop sending today.
- How to remove duplicate emails from a CSV The four normalisation rules a spreadsheet misses.
- Why Gmail addresses with dots are duplicates Dots and +tags, and where the rule stops applying.
- What an MX check proves (and what it doesn't) The highest-yield filter for a dead list.
- All 15 guides →
FAQ
Is my list uploaded to a server?
No. Parsing, cleaning and exporting happen in your browser. The only network requests are DNS lookups of domains (not full addresses) to a public resolver, which is how any mail server check works.
Does a valid MX record guarantee the inbox exists?
No tool can guarantee a mailbox exists without sending mail. MX verification proves the domain can receive email and is the strongest check possible without a verification API — it removes the biggest category of bounce: dead or mistyped domains.
Why do Gmail dots and +tags get merged?
Gmail ignores dots and everything after +, so jane.doe+news@gmail.com and janedoe@gmail.com are the same inbox. Sending to both doubles your cost and your spam complaints.
What happens after I pay?
Checkout sends you straight back here with the limit removed on that browser. Because there is no account, keep the receipt email — it contains the unlock link for other devices.
Can I get a refund?
Yes. Reply to the receipt within 30 days and you get your money back, no questions.