Playground
Try the API without signing up — validate an XRechnung document or generate one from JSON. Anonymous use is limited to 10 requests/hour; create a free account for 100 calls a month.
UBL Invoice XML
Result
Validation runs against EN 16931 core rules (including the BR-S/E/AE/Z/G/O VAT families) plus the German XRechnung (BR-DE) profile. Both syntaxes are auto-detected: UBL and CII (ZUGFeRD/Factur-X XML). Load the broken sample to see it catch a missing buyer reference and a VAT arithmetic error.Everything runs in your browser — the XML never leaves your machine.