Browser-only utility
Prepare a clean batch before verification.
Normalize a pasted list, remove duplicates, and flag obvious syntax problems. Processing happens entirely in this browser; nothing is uploaded or network-verified here.
One per line, or separated by commas and semicolons0 characters
Privacy note: this tool uses local JavaScript only. It does not call the verifier, query DNS, perform SMTP traffic, or send pasted addresses to our server.
What happens next
Network verification remains private.
Authorized operators transfer approved input to the private host, reserve daily quota, run the batch, and return a CSV with conservative classifications and reasons. Read the documentation →