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VAT Tool Checker

Paste a VAT number (or a list) to validate the country prefix and format, and run checksum rules where supported. This tool is offline—no VIES/API calls—so it can’t confirm if a VAT number is registered, only whether it looks valid.

Category: Finance · URL: /tools/vat-tool-checker.html
Offline check only: no VIES/API registration lookup.
Checksum: GB, IE (common format) 


  

    Related tools:

    VAT Checker Ireland (IE) ·
    VAT Checker Great Britain (GB) ·
    VAT Checker UK (GB/XI) ·
    VAT Checker Ukraine (UA)

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            Privacy: runs locally in your browser. No uploads, no tracking scripts.
          

        

      


      
    


    

      
How to use

      
Use this when you need a fast, offline sanity check before calling an API or sending an invoice.
  1. Paste one VAT number per line.
  2. Choose Auto-detect (uses the prefix) or force a country if your input has no prefix.
  3. Click Check to see normalized output and validation status.
  4. Use Copy results to paste into spreadsheets or tickets.

      

        Keywords this page targets (natural cluster): vat tool checker, vat checker, check vat number, vat number validator, vat id format check, validate uk vat number, validate ie vat number, gb vat checksum, ireland vat checksum, eu vat number format, bulk vat number checker, normalize vat number, remove spaces from vat number, vat number regex, vat prefix checker, vat number validation offline, xi vat number checker, nl vat format check, de vat format check, fr vat format check, it vat format check
      

      

        Secondary intents covered: Validate whether a VAT number has a correct country prefix and expected length, Normalize VAT numbers (remove spaces, dashes, dots) for invoicing/ERP import, Run an offline checksum check for supported countries (e.g., GB, IE), Bulk-check a list of VAT numbers and export/copy results, Identify why a VAT number fails (wrong prefix, bad characters, wrong length, checksum mismatch), Decide which country-specific VAT checker to use next
      

    


    

      
FAQ

    
Does this tool verify a VAT number is registered (VIES)?
No. It runs offline format and selected checksum checks only; registration requires an online lookup (e.g., VIES or a VAT API).
Which countries have checksum validation here?
GB (UK) and IE (Ireland, common 7-digits + letter format). Other countries are checked for format only.
Can I paste multiple VAT numbers at once?
Yes—one per line. The output includes a compact block for each input plus a summary line.
Should I include the country prefix (like GB or IE)?
For auto-detect, yes. If your list has no prefixes, select the country and enable “Allow numbers without a country prefix”.
Why does it say “FORMAT OK” instead of “VALID”?
“FORMAT OK” means the pattern looks right but no checksum rule was applied for that country in this tool.
How are spaces and dashes handled?
They’re removed automatically. The tool normalizes to uppercase and keeps only letters and digits.
What about Northern Ireland VAT numbers (XI)?
XI numbers are accepted and checked like standard UK digit VAT IDs (where applicable).