Online CEP Validator

About this validator

This tool checks whether the CEP has a valid structure for use in Brazilian forms and registrations.

It helps block simple typing mistakes, but it does not replace a real address lookup.

Best practices

• Remove non-numeric characters before validation.
• Use the check on the frontend to speed up form completion.
• Pair it with CEP lookup to autocomplete addresses when needed.

Important notice

This tool validates only CEP format. It does not guarantee address existence or a match with a real location.