Free Payment Checkers

Small tools for the identifiers behind most payment rejects. Each one checks the format, explains what it found and links to the codes you get back when a payment fails.

All checks run in your browser. Nothing you type is uploaded, stored or logged. They are format checks: a valid result does not confirm that an account, bank or payment exists.

• IBAN Checker

  Validate an IBAN (country, length, structure, check digits) and split it into bank code, branch and account.

• BIC Checker (Swift Code Format)

  Check the format of a BIC (Swift code) and decode party prefix, country, location and branch.

• UETR Checker

  Check that a UETR is a lower-case version 4 UUID and see where it appears in MT and ISO 20022 payments.

• MT/MX Message Parser

  Decode any Swift MT or ISO 20022 message field by field, with format checks on BICs, IBANs, dates and amounts.

• IBAN formats by country

  Length, structure, bank code and an example IBAN for each of the 89 IBAN countries.

• ISO 20022 reason codes

  What reject, return and cancellation codes such as AC04, AM04 or MS03 mean and what to do next.