Read the country format
The selected rule supplies the two-letter country code, fixed total length, BBAN character pattern, and visible component labels.
Free developer utility
Free IBAN Generator for Valid Test IBANs
Generate random, checksum-valid International Bank Account Numbers for software testing, QA, demos, documentation, and education.
Choose a country, create one or many synthetic values, and copy or export the results. Generation and validation happen locally in your browser.
- No sign-up
- Local browser processing
- MOD-97 self-check
- CSV and JSON export
- IBAN generator online free testing — country format
- IBAN generator online free testing — MOD-97 checksum
- IBAN generator online free testing — synthetic data
- IBAN generator online free testing — CSV export
- IBAN generator online free testing — JSON export
Synthetic test resultMOD-97 passed
DE89 3704 0044 0532 0130 00
- Country
- Germany
- Length
- 22 characters
- Existence
- Not checked
This is an explanatory example, not a generated real account.
Browser-based test data
Generate Random IBAN Numbers Online
Select an IBAN country, choose a quantity and output format, then generate synthetic test values with calculated check digits.
Ready to generate synthetic IBAN test data.
Your generated IBANs will appear here
Every result is checked for country length, character pattern, and MOD-97 checksum before display.
Testing only. A checksum-valid IBAN is not proof that a bank or account exists. Never use generated data for transfers, direct debits, identity claims, or financial verification.
Country formats
Popular IBAN Generator Countries
Open a country-focused generator with the correct preset, a concise structure reference, testing notes, and country-specific questions.
Transparent method
How the IBAN Generator Works
The tool uses a small, transparent pipeline instead of returning a prewritten list of bank details. Every value is assembled and checked in the current browser session.
Create a synthetic BBAN
Cryptographically strong browser randomness fills numeric, alphabetic, and alphanumeric fields, including zero where the field permits it.
Calculate check digits
The BBAN, country code, and placeholder digits are rearranged and converted according to the ISO 13616 calculation process.
Run MOD-97
The tool calculates the two international check digits and validates the completed value for a remainder of 1.
Display or export
Results are shown in print or electronic format and can be copied or exported for isolated test environments.
Country structure and character rules
An IBAN begins with a two-letter country code and two check digits. The remaining Basic Bank Account Number is fixed in length for each participating country, but its internal fields differ. One format may use an alphabetic bank identifier, another may use a numeric bank and branch code, and another may include a domestic check field. This random IBAN generator uses published high-level lengths and character patterns. It does not pretend that a randomly created bank identifier is listed in a national banking directory. That distinction keeps the tool suitable for format tests without making an unsupported account claim. IBAN calculations create a long numeric string after letters are converted to values from A=10 through Z=35. The browser processes that string incrementally rather than coercing it into a normal JavaScript number, which would lose precision for long IBANs. A successful MOD-97 result confirms that the international checksum is internally consistent. It does not confirm bank membership, branch existence, account ownership, account status, currency, or the ability to receive a payment.
Format source: Swift ISO 13616 IBAN Registry. The generator checks structure and MOD-97; it does not query SwiftRef or any bank account directory.
Read before use
Checksum-Valid IBAN vs Real Bank Account
The word valid has several meanings. On this site it is deliberately limited to checks that can be performed from the IBAN string itself.
What the tool verifies
- Two-letter country code is supported
- Total length matches the selected country
- BBAN uses the expected broad character classes
- International MOD-97 checksum returns remainder 1
What the tool cannot verify
- A bank actually issued the IBAN
- The bank or branch identifier is active
Searches for a fake IBAN generator often come from developers who need realistic-looking input for a checkout, onboarding form, direct-debit screen, API contract, database migration, or automated test. Synthetic data is safer than copying a customer's bank details, but it should be clearly separated from production data and marked as non-payable. There is no universal reserved range of IBANs guaranteed never to overlap with an issued account. For that reason, generated values must stay in test, staging, demo, training, and documentation environments. Never initiate a transfer or direct debit to a generated value, and never use one as proof of account ownership. When a workflow needs production-grade verification, collect the IBAN from the account holder and use an appropriate regulated or bank-connected validation service. A mathematical checker alone cannot replace those checks.
Practical workflows
When to Use Random IBAN Test Data
The generator is designed for repeatable product and engineering tasks where real financial information would be unnecessary or inappropriate. Create varied country-length values to test column sizes, normalization, display formatting, imports, exports, and duplicate handling. Show developers where the country code, check digits, and BBAN appear while avoiding screenshots of private banking information. Generate small batches for checkout, onboarding, direct-debit, and account-detail scenarios across different country formats. Demonstrate the difference between structure validation, MOD-97 checksum validation, bank-directory checks, and real account verification.
Payment form QA
Exercise masking, grouping, maximum length, country selection, client-side validation, error messages, and confirmation screens without entering customer data.
API contract tests
Populate request payloads and fixtures with values that satisfy international checksum checks while keeping the dataset explicitly synthetic.
Questions answered
IBAN Generator FAQ
What is an IBAN generator?
An IBAN generator creates synthetic International Bank Account Number strings for testing. This tool follows the selected country's fixed length and broad BBAN character pattern, calculates the two international check digits, and rechecks MOD-97 before displaying a result.
Are generated IBANs real bank accounts?
No. They are synthetic test data. The tool does not query a bank, branch directory, SwiftRef, payment network, account owner, or account-status service.
Can a generated IBAN pass validation?
It can pass supported country-length, broad character-pattern, and MOD-97 checksum checks. A specialist validator or bank may also check domestic rules and whether the bank identifier exists, so a synthetic value can still fail deeper validation. It serves the legitimate testing intent behind that phrase, but we use the clearer term synthetic IBAN test data. Generated values must not be used for payments, identity claims, account verification, or fraud. No generated values are sent to our application server. Generation, checksum calculation, copying, and export occur in the browser. Normal hosting, analytics, security, and advertising services may still process technical usage data as explained in the Privacy Policy. Yes. The homepage can create small batches, while the Bulk IBAN Generator creates up to 100 values and exports CSV or JSON for testing and QA. A generator creates new synthetic values. An IBAN checker examines a value you already have for supported country format and MOD-97 consistency. Neither tool proves that a bank account exists. Not safely with a universal formula. National conversion rules and bank-specific procedures differ, and the servicing bank is the authoritative source for a real account's IBAN. This site intentionally generates synthetic test data instead.