Free · No data retained
Validate your EN 16931 e-invoices in seconds
Factur-X (CII) and UBL 2.1 are genuinely validated against the EN 16931 rules (BR-*). No false positives, no stored data.
No file persistence Real EN 16931 rules (BR-*) REST API + OpenAPI
Drop your file here
or click to browse — XML (Factur-X/CII, UBL 2.1) or Factur-X PDF/A-3
Choose a fileor paste the XML directly:
How it works
1. Drop
Drag and drop your XML invoice or Factur-X PDF/A-3, or paste the XML directly.
2. Real validation
The engine applies the EN 16931 rules (BR-*) on the detected format (CII or UBL 2.1).
3. Clear report
Each error is explained in plain language, with the field concerned.
Actual coverage
Supported today
Factur-X / CII (UN/CEFACT Cross Industry Invoice) and UBL 2.1 (OASIS).
On the roadmap — never simulated
Peppol BIS Billing 3.0, FatturaPA (Italy), Verifactu (Spain): these formats explicitly return a "not implemented" response, never a false success.