Upload a list, get a cleaned file back.
Drop in a CSV of numbers. We'll check each one and hand back the results.
Not sure of the format? Download a sample CSV to see what we expect.
Free, no signup — up to 10 real checks per visitor per day, shared across every free tool on this site.
Got more than one list to clean?
Automate this with the API — same check, no manual upload, no row cap.