Official rules · runs in your browser

E-invoice validator – is my e-invoice correct?

Drop an XRechnung, Peppol, UBL or CII file, or a ZUGFeRD / Factur-X PDF. We check it against the official EN 16931 rules – plus XRechnung, Peppol and the French rules when they apply.

Drop the e-invoice to check (XML or PDF)

or click to choose a file – it never leaves your computer

Official rulesThe same rule sets the official validators use: CEN EN 16931, KoSIT XRechnung 3.0 and OpenPeppol.
100% privateThe check runs in your browser. Your invoice is not uploaded anywhere.
XML and PDFUBL and CII files, plus the XML inside ZUGFeRD and Factur-X PDFs.
Clear resultsEvery problem with its rule number, the official message and where it is in the file.

Questions

Which rules are checked?

Always the European standard EN 16931 (CEN rules for UBL or CII). If the invoice says it is an XRechnung, also the KoSIT XRechnung 3.0 rules; for Peppol BIS Billing 3.0 also the Peppol rules; for CII invoices from a French seller also the French BR-FR rules.

Is the result legally binding?

No. The check uses the official rule files, but only the recipient or the official validator of your platform decides. It does not check the XML schema (XSD) in detail – the business rules catch most real-world errors.

What is the difference between XRechnung and ZUGFeRD?

XRechnung is a pure XML file (German rules on top of EN 16931). ZUGFeRD / Factur-X is a PDF with the XML built in, so people can read it and software can process it. Both are valid e-invoices in Germany if they follow EN 16931.

My invoice has errors. What now?

Each error shows the rule number and the official message. Correct the data in your invoicing software – or create a new, valid e-invoice for free with our form.

Is my file uploaded?

No. Your browser downloads the rule files once and runs the check locally. The invoice never leaves your computer.

Rules: CEN/TC 434 EN 16931 validation artefacts (EUPL 1.2), KoSIT XRechnung schematron (Apache 2.0), OpenPeppol BIS Billing 3.0, French BR-FR rules (AIFE). Engine: SaxonJS © Saxonica Ltd.