IBAN Generator

The IBAN Generator provides deterministic, standards-compliant IBAN strings for testing, demonstrations, and integration work. Primary users are developers, QA engineers, financial tech teams, and banking integrators who need realistic inputs without exposing real customer data. Typical use cases include API testing in sandbox environments, data migration validation, and documentation samples where IBAN structure must be accurate yet non-production. The tool supports multiple country formats through a common, rules-based model.
Core logic includes country-specific BBAN construction, check digit calculation using the standard MOD-97-10 method, and formatting into readable blocks. Required inputs are country_code (2-letter ISO), bank_code, and account_number. Optional/advanced inputs include branch_code, currency, and a toggle to override check digits for negative testing or fault injection. Outputs consist of a single IBAN string; extended workflows may enable batch generation or export in advanced usage.
Inputs & outputs: The tool accepts inputs as strings with country-specific length constraints; validation enforces allowed characters and correct country code. The output is the IBAN string combining country code, check digits, and BBAN, formatted with spaces every four characters (e.g., DE89 3704 0044 0532 0130 00). The algorithm performs letter-to-number conversion (A=10 … Z=35), moves the country code to the end, computes mod-97, and derives the check digits so the result passes the mod-97 test.
Algorithms & Calculations: The IBAN is generated by following the ISO 13616 standard: replace letters with numbers, rearrange, apply mod-97, and set check digits to 98 minus the remainder; BBAN construction follows country-specific rules embedded in the generator. Error & Edge Cases: invalid or unknown country_code, missing fields, or invalid characters trigger precise, domain-focused errors. If a country’s BBAN is not fully modeled, the tool uses a best-fit template and flags potential variations. External data unavailability is handled as non-fatal; results can still be generated locally. Industry/Region & Localization: Aligns with ISO 13616 IBAN standards; output is suitable for testing and documentation across regions that use IBAN, without implying real banking transactions. Assumptions & Exclusions: No actual funds transfer; no real bank verification; no guaranteed exhaustive coverage of every country’s BBAN variant.