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IBAN Validator

Paste or type any IBAN. We check the format, verify the check digits, and identify the bank — instantly, in your browser.

Your IBAN never leaves your browser. All validation runs locally.

What Is an IBAN?

An International Bank Account Number (IBAN) is a standardized format for identifying bank accounts across borders. Introduced by the ISO 13616 standard, it is used in over 80 countries — and is mandatory for all payments within the EU and the Single Euro Payments Area (SEPA).

How IBAN Validation Works

Every IBAN includes a two-digit check number (positions 3–4) calculated using the MOD-97 algorithm. This mathematical verification catches over 99% of typos and transcription errors. Our validator performs this check instantly in your browser — your IBAN data never touches any server.

IBAN Formats by Country

IBAN length and structure vary by country. The table below shows the format for all EU and SEPA countries.

EU

Country Code Length Example
🇦🇹 Austria AT 20 AT61 1904 3002 3457 3201
🇧🇪 Belgium BE 16 BE68 5390 0754 7034
🇧🇬 Bulgaria BG 22 BG80 BNBG 9661 1020 3456 78
🇭🇷 Croatia HR 21 HR12 1001 0051 8630 0016 0
🇨🇾 Cyprus CY 28 CY17 0020 0128 0000 0012 0052 7600
🇨🇿 Czech Republic CZ 24 CZ65 0800 0000 1920 0014 5399
🇩🇰 Denmark DK 18 DK50 0040 0440 1162 43
🇪🇪 Estonia EE 20 EE38 2200 2210 2014 5685
🇫🇮 Finland FI 18 FI21 1234 5600 0007 85
🇫🇷 France FR 27 FR76 3000 6000 0112 3456 7890 189
🇩🇪 Germany DE 22 DE89 3704 0044 0532 0130 00
🇬🇷 Greece GR 27 GR16 0110 1250 0000 0001 2300 695
🇭🇺 Hungary HU 28 HU42 1177 3016 1111 1018 0000 0000
🇮🇪 Ireland IE 22 IE29 AIBK 9311 5212 3456 78
🇮🇹 Italy IT 27 IT60 X054 2811 1010 0000 0123 456
🇱🇻 Latvia LV 21 LV80 BANK 0000 4351 9500 1
🇱🇹 Lithuania LT 20 LT12 1000 0111 0100 1000
🇱🇺 Luxembourg LU 20 LU28 0019 4006 4475 0000
🇲🇹 Malta MT 31 MT84 MALT 0110 0001 2345 MTLC AST0 01S
🇳🇱 Netherlands NL 18 NL91 ABNA 0417 1643 00
🇵🇱 Poland PL 28 PL61 1090 1014 0000 0712 1981 2874
🇵🇹 Portugal PT 25 PT50 0002 0123 1234 5678 9015 4
🇷🇴 Romania RO 24 RO49 AAAA 1B31 0075 9384 0000
🇸🇰 Slovakia SK 24 SK31 1200 0000 1987 4263 7541
🇸🇮 Slovenia SI 19 SI56 2633 0001 2039 086
🇪🇸 Spain ES 24 ES91 2100 0418 4502 0005 1332
🇸🇪 Sweden SE 24 SE45 5000 0000 0583 9825 7466

SEPA

Country Code Length Example
🇨🇭 Switzerland CH 21 CH93 0076 2011 6238 5295 7
🇬🇧 United Kingdom GB 22 GB29 NWBK 6016 1331 9268 19
🇮🇸 Iceland IS 26 IS14 0159 2600 7654 5510 7303 39
🇱🇮 Liechtenstein LI 21 LI21 0881 0000 2324 013A A
🇳🇴 Norway NO 15 NO93 8601 1117 947
🇲🇨 Monaco MC 27 MC58 3000 6000 0112 3456 7890 189
🇸🇲 San Marino SM 27 SM86 U032 2509 8000 0000 0270 100
🇦🇩 Andorra AD 24 AD12 0001 2030 2003 5910 0100

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Frequently Asked Questions

Is my IBAN data safe?
Yes. All validation happens in your browser using JavaScript. Your IBAN is never sent to any server. You can verify this by disconnecting from the internet — the tool will still work.
Which countries are supported?
We support all 27 EU member states plus Switzerland, the United Kingdom, Norway, Iceland, Liechtenstein, Monaco, San Marino, Andorra, Vatican City, Gibraltar, the Faroe Islands, and Greenland — every country in the SEPA zone and beyond.
Can this tool verify that the account exists?
No. IBAN validation checks the format and mathematical integrity of the number. It cannot confirm whether the account is active, belongs to a specific person, or holds funds. Only the issuing bank can verify account existence.
What does 'check digits failed' mean?
The two digits after the country code (positions 3–4) are calculated from the rest of the IBAN using the MOD-97 algorithm. If they don't match, the IBAN almost certainly contains a typo. Double-check each character carefully.
Why do IBAN lengths differ between countries?
Each country incorporates its domestic bank account number format (called BBAN) into the IBAN. Countries with longer account numbers naturally produce longer IBANs. Norway has the shortest (15 characters) and Malta the longest in the EU (31 characters).
Can I validate multiple IBANs at once?
This tool validates one IBAN at a time. If you regularly process large volumes of IBANs — from invoices, payment lists, or supplier data — Veluvanto can extract and validate them automatically as part of your document workflow.

Working with invoices daily?

Veluvanto automatically extracts IBANs, VAT numbers, and payment details from your documents. Upload a PDF and let AI do the rest.

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