Brazilian Bank Account Validator
Validate Brazilian bank account numbers by check digit for major banks (Bradesco, Itaú, Banco do Brasil, Santander and Caixa). Browser-side verification.
How does the validation work?
Each Brazilian bank uses its own algorithm (generally variations of modulo 11) to calculate the check digit of the agency and account. This digit validates that the other numbers are consistent and were entered correctly.
This tool mathematically verifies the check digit — it does not query any banking database or confirm the actual existence of the account.
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