Is your email list worth sending to?
Every other list cleaner asks you to upload your customers to a stranger's server first.
One per line, or separated by commas. A column pasted straight out of a spreadsheet works, and so does "Name <address>" from a mail client.
Your list never leaves this pageNo sign-upNo limit
The upload is the problem
Cleaning a list is string handling. It needs no server, no account and no processor agreement, and almost every tool that does it starts by taking a copy of other people's personal data.
You are handing over personal data
An email list is personal data under the GDPR, and uploading it to a service is a disclosure to a processor you have probably not vetted, for a job that never needed one.
Bounces cost you the next send
Mail providers watch your bounce rate. A list with dead addresses in it does not just fail on those: it lowers what the rest of the list is worth, on every send after.
The typos are close enough to miss
gmial.com and hotmial.com look right at a glance, arrive from real people at signup, and bounce every time. Nobody spots them by reading down a column.
Paste, sort, take back what is good
Paste the list
One per line, comma separated, a spreadsheet column, or "Name <address>" straight out of a mail client.
It sorts them in the page
Nothing is uploaded. No request is made, including to this site.
Copy or download the good ones
Deduplicated and lowercased. Everything removed is shown, with what was wrong with it.
What it sorts out
Duplicates, whatever case
Adam@Example.com and adam@example.com are one person, and no spreadsheet's remove-duplicates will tell you that. The first one survives.
Addresses that cannot be sent to
And it says which fault, in words: no dot in the domain, two dots in a row, a space in the middle. Not "invalid".
Mistyped domains
gmial, hotmial, yahooo and the rest, with the correction suggested rather than the row silently deleted.
Departments, not people
info@, sales@, support@. Valid addresses that reach a team, which is a different thing from a subscriber. Separated, not thrown away.
Throwaway inboxes
The temporary providers people use to get past a signup form. They are real addresses today and gone next week.
The clean list back
Copy it or download it as a text file, built in the page from data that never left it.
Straight talk about what it cannot see
It reads the text of the addresses. That is a real and limited thing, and the limit is where most list tools start overclaiming.
It is not a verifier
Nothing here says whether an address receives mail. That needs a conversation with the mail server and costs money per address, and claiming it from a syntax check would be a lie.
Clean is not the same as wanted
A tidy list of people who never asked to hear from you is still the thing that gets a sending domain blocked. Permission is not a property of the text.
Some removals are your call
Department addresses and throwaway domains are separated rather than deleted, because whether they belong on your list depends on what you send.
Nothing is uploaded, at all
The sorting happens in your browser and the download is built from what is already in the page. There is no request to make and nothing to trust.
Clean it without handing it over
The only copy of your list stays on your machine, which is how it should have been all along.