VAT Number Validator
Shortcut ⌘↵Checksum and format validation for UK and EU VAT numbers — no VIES call required.
100% client-side · no data leaves this device
Valid — Passes the GB mod-97 check
Country
United Kingdom (GB)
Normalised
GB333289454
Structure
9 or 12 digits, GD000–GD499 or HA500–HA999
Check
GB mod 97
Validation level
Checksum
Format-only countries pass structure checks without checksum validation. Always confirm with the relevant tax authority.