Email Normalizer

This tool canonicalizes a list of email addresses so that delivery-equivalent aliases collapse to the same string. It lowercases the address, trims whitespace, and for Gmail addresses it additionally removes dots from the local part and strips plus-suffix aliases (treating googlemail.com as gmail.com). For other providers it only strips the plus-suffix alias. A live counter shows total, unique, and duplicate counts.

1. Paste one email address per line into the Input box (blank lines are ignored). 2. Read the normalized addresses in the Result panel; normalization updates automatically as you type. 3. Use the Total / Unique / Duplicates counters to see how many addresses collapse together. 4. Click Copy to copy the normalized list to your clipboard.

Gmail (gmail.com and googlemail.com) is normalized aggressively: the domain is forced to gmail.com, dots in the local part are removed (john.doe becomes johndoe), and anything from the first plus onward is dropped (user+news becomes user). Non-Gmail addresses are only lowercased, trimmed, and have their plus-suffix alias removed; their dots are preserved. Because the output reflects what Gmail actually delivers to, several distinct-looking aliases will usually normalize to a single unique address.