An IBAN is a standardized international bank-account identifier. IBAN Validator checks its format, expected country length, and mathematical checksum—digits used to catch many typing mistakes. It does not contact a bank.
Check the built-in sample
The IBAN field starts with GB82 WEST 1234 5698 7654 32, a published demonstration value. The status should say Valid IBAN. In the results, Country is GB, Check digits are 82, and Formatted groups the characters in blocks of four. Replace the final 2 with 3: the tool should report Checksum failed. Restore the 2 to get the sample result again.
BBAN is the account-specific part after the country code and check digits. Do not assume a checksum match proves that account exists, is open, or belongs to the person you are paying. Check payment details through an independent trusted channel; do not share real account numbers in public examples.
Where your input goes
Processing runs in your browser. The tool does not upload your input to ilham.dev.
Related guide
For more background, read Indonesian Data Formats.
Questions you might have
- Does a valid IBAN mean the account exists?
- No. A checksum match only indicates the string has a plausible structure and check digits. Some incorrect numbers can still pass, and the tool does not query a bank or check account ownership.