VAT Number Validator

How to use

1. 1Pick the mode: Single VAT number for a one-off check, or Batch list to validate many at once.
2. 2Type or paste a VAT number including the 2-character country prefix (EL for Greece, XI for Northern Ireland). Spaces, dots, dashes, and slashes are ignored; letters are uppercased automatically.
3. 3Read the result: green is a passing format and check digit; amber is a passing format with no public checksum for that subform; red is an invalid format or a failed check digit.
4. 4Open the Check details panel to see exactly which step passed (format pattern, check-digit algorithm) and which step failed, with a country reference card showing the official format.
5. 5In Batch mode, see the per-line verdict, the totals, and copy the passing list with one click for downstream use.

About this tool

VAT Number Validator runs the format and check-digit rules for every EU VAT identification number and the UK and Northern Ireland (XI) VAT numbers, so a freelancer, bookkeeper, or developer can sanity-check a VAT ID before sending an invoice, calling the EU VIES service, or storing it in a customer record. Each country in the EU and the UK publishes a fixed format for its VAT ID: Germany's 9 digits, France's 2-character key followed by a 9-digit SIREN, Italy's 11-digit Codice Fiscale-style number, Spain's NIF/NIE/CIF (with a final check letter for NIF and NIE and a check letter or digit for CIF), the Netherlands' 9 digits then B then 2 digits, Belgium's 10 digits where the first 8 mod 97 plus the last 2 must equal 0, Poland's 10-digit NIP with weighted mod 11, Portugal's 9 digits with the standard mod 11 check, Greece's EL prefix (not GR) with a powers-of-2 mod 11 check, Croatia's 11-digit OIB Modulus 11,10, Ireland's mod 23 check letter, the UK's HMRC mod 97 or mod 9755 check, and so on. The validator applies the country's regex first to catch the wrong length, the wrong character classes, missing letters, or a forgotten B in a Dutch number, then runs the published check-digit algorithm where one exists. The result panel shows a clear verdict (valid, format-only, or invalid), the country, the formatted and compact forms, the body, every check that ran with the reason it passed or failed, and a country reference card with the prefix, the format pattern, an example, and the country's EU/UK status. Batch mode validates one VAT number per line and counts how many passed, how many are format-only (no public checksum exists for that subform), and how many failed; a single click copies the passing list so a procurement or finance workflow can move on. Quick samples seed the input with the canonical examples from the European Commission documentation. Everything runs locally in your browser; the VAT numbers you type here are not uploaded, logged, or shared. A passing format and check digit prove a VAT number is well-formed; they do not prove the company exists or is currently registered, so always confirm a payment-bearing invoice against the EU VIES database or the UK HMRC VAT registration service before relying on it for reverse-charge.

Free to use. Works in your browser. No signup, no login.