Free ZUGFeRD validator

ZUGFeRD is the German hybrid PDF/A-3 e-invoice standard, technically identical to Factur-X. Drop a file below and it is checked against the OFFICIAL engines — veraPDF for PDF/A-3 and the KoSIT schematron for EN 16931. No signup. An engine that did not run returns null, never a fabricated pass.

🇫🇷 France mandate: from 1 September 2026 every business must be able to RECEIVE structured e-invoices. Confirm a supplier's ZUGFeRD is actually conformant before it hits your accounting — that is exactly what this checks.

Drop a ZUGFeRD invoice or click to choose PDF (Factur-X / ZUGFeRD) or EN 16931 XML — nothing is stored

Validate it from your code (API)

The same engine, one call. POST https://facturproof.com/v1/validate — 1 credit, or the free no-key trial below. See the OpenAPI spec.

# Free, no key:
curl -F "file=@invoice.pdf" https://facturproof.com/v1/validate/try

Get an API key — free tier Human-readable invoice viewer →

FacturProof — official-validator attestations for Factur-X / ZUGFeRD / XRechnung / EN 16931. A conformance verdict is honest: a failed check is a real answer, never an error.