Paste a list — thousands of addresses is fine. Everything runs in your browser; nothing is uploaded, stored, or sent anywhere.
Or drag a file onto the box above — choose a CSV or text file. Any column layout works; addresses are found wherever they sit.
Root domain grouping is public-suffix aware, so r.patel@bbc.co.uk and
news@bbc.co.uk land together under bbc.co.uk rather than splitting on
co.uk. Exact domain grouping keeps every distinct mail host separate —
mail.acme.com and acme.com stay apart.
Paste anything — a web page, a directory dump, a spreadsheet column, an email header block. Every address is pulled out, cleaned, and deduplicated, then joined however you need it.
Or drag a file onto the box above — choose a CSV or text file.
Duplicates are matched case-insensitively, so Dana@gmail.com and
dana@gmail.com count once. Trailing punctuation, angle brackets,
mailto: prefixes, and surrounding text are all discarded.
Paste the list and every address is sorted into a group per domain, ordered by size. Each group has a one-tap copy button and its own CSV download.
Each mail domain keeps every distinct host separate, so mail.bbc.co.uk and bbc.co.uk are counted apart. Group by company merges them, using the public suffix rules — so bbc.co.uk isn't wrongly split on co.uk the way naive tools do it.
Yes. Every group card has its own CSV button, named after the domain. You can also export everything at once to CSV, XLSX or JSON.
Tens of thousands. Only the first 60 addresses in each group are rendered on screen, with the rest available on request, which keeps a large paste responsive.
No. The grouping happens entirely on your own device.