Account Number Validator

Validates bank account numbers and IBANs for correctness and formatting. It accepts an account_number string and an optional country_code, applies country-specific length rules, and performs checksum verification (IBAN MOD 97-10 or applicable local schemes). It outputs a structured result including is_valid, detected country_code, and a normalized form (IBAN or local). The tool supports both international and domestic formats and is suitable for finance teams, ERP integrations, and payment workflows.
Conceptually, the process breaks inputs into components, strips separators, detects country when possible, and applies the appropriate checksum algorithm. If validation fails, it provides specific reasons such as incorrect length, invalid checksum, or unrecognized country. It also performs normalization by inserting standard separators and returning a canonical IBAN when feasible. Optional advanced behavior can include batch validation via API or file input, returning a list of results with per-record status.
Core differentiators include dual support for IBAN and local account formats, robust error signaling, explicit country detection, and a compact, machine-friendly output. This reduces manual data cleanup, minimizes payment errors, and accelerates onboarding of partners that provide nonstandard account numbers. Typical use cases include supplier payments, payroll integrations, and customer profile validation. The tool is designed to be deterministic, stateless, and auditable, with clear inputs and outputs that facilitate automated data quality checks across financial systems.