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IBAN Validator — Check IBAN Numbers Online (Batch)

Check IBANs for the correct length, country format and mod-97 check digits. Paste up to 500 IBANs, one per line; see the country, the formatted IBAN and what is wrong. Runs in your browser.

Convert in your browser · No sign-up

One IBAN per line, with or without spaces. The check confirms format and check digits only — not that the account exists or who holds it.

Up to 100,000 UTF-16 units per input and 1,000,000 per result. See the supported formats and examples below.

Result

Add your input or load an example, then run the tool. Your result will appear here.

How to use

  1. Paste one or more IBANs, one per line. Spaces, lowercase letters and an “IBAN” prefix are fine.
  2. Run the check.
  3. Each line shows ✓ or ✗, the formatted IBAN, the country and expected length, and the reason when it fails.

Example

DE89 3704 0044 0532 0130 00 → ✓ Germany, 22 characters
DE89 3704 0044 0532 0130 01 → ✗ check digits do not match

Details and limitations

An IBAN is valid when its length matches the country (22 for Germany, 27 for France and Italy, 24 for Spain and Saudi Arabia…), its national part (BBAN) has the right pattern and the mod-97 check over the whole number equals 1 (ISO 13616).

A valid IBAN can still belong to a closed account or to someone else. Confirm the account holder with your bank (for example the EU Verification of Payee check) before sending money.

FAQ

Does a valid IBAN mean the account exists?

No. Only the bank can confirm that. The check digits catch typing mistakes such as a wrong or swapped digit.

Can I check the account holder’s name?

Not here. Name checks such as Verification of Payee are done by banks when you make a transfer.

Are the IBANs I paste uploaded?

No. The check runs entirely in your browser; nothing is sent to a server.

Format references

Tool page updated: