Does this CSV address validator check that an address is deliverable?+
No. It checks that each row is well formed: required parts are present, the country resolves to an ISO 3166-1 code, and the postal code matches the country's published pattern. It does not run CASS, SERP, AMAS, geocoding, or any postal database lookup, so a well-formed address can still be undeliverable.
Is my address list uploaded anywhere?+
No. Parsing, mapping, checks, masked findings, and downloads all run in the current browser tab. No name, street, postal code, or finding is sent to a postal service, geocoder, or csvtodashboard.
Which postal code formats are checked?+
United States ZIP and ZIP+4, Canada, United Kingdom, Australia, Germany, France, Netherlands, India, Japan, Ireland (Eircode), New Zealand, Spain, and Italy. Other countries keep their postal code unchanged and unchecked.
Does it check that a ZIP Code belongs to the state?+
No. Matching a state, city, or province to a postal code needs a postal database. The tool only checks the format of each part separately.
How are country names normalized?+
Common English names, ISO 3166-1 alpha-3 codes, and alpha-2 codes become the alpha-2 code, such as United States, USA, and US becoming US. Names that can mean more than one country, such as Korea or Georgia, are flagged for review instead of guessed.
What happens to duplicate addresses?+
Rows that are identical after normalization are held out of the clean list and listed in the flagged list. Rows that share address line 1 and postal code but differ elsewhere are flagged for review and kept.