Validate email addresses in bulk, split valid and invalid ones, and copy the results — 100% in your browser.
Valid
Invalid
Paste a list of email addresses (one per line, or separated by commas / semicolons) and click Validate. The tool checks the format with a regular expression, splits them into Valid and Invalid panes, and shows counts. Click Copy valid to grab the clean list. This only checks syntax — it does not verify the mailbox actually exists.