VAT Validator
Batch-check VAT formats and checksums locally, then optionally verify EU registrations with VIES
For Development & Testing Purposes Only - Synthetic Mock Data
Examples
Two-tier EU VAT check
DE136695976Local checksum result, followed by optional VIES statusLocal validation is immediate; VIES confirms registration state when the external service is available.
About this tool
VAT Validator separates local format and checksum validation from live EU registration verification. Batch inputs are checked in the browser before any optional VIES request.
Only the VAT number explicitly submitted through the VIES action is sent to the DevTools backend proxy and European Commission service.
Use cases
Checkout QA
Test offline error handling and live registration checks independently.
Batch import review
Export row-level country, type, validity and error metadata.
Common mistakes
Mistake:Treating a checksum as registration proof
Fix:Use the explicit VIES action for supported EU VAT numbers.
Frequently asked questions
Related guides
References & standards
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