Validate your XML invoices against official KoSIT XRechnung and EN16931 standards. Free, instant, and privacy-friendly.
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KoSIT (Koordinierungsstelle für IT-Standards) is the German coordination office for IT standards. The KoSIT validator is the official tool for checking XRechnung and other e-invoice formats against the EN 16931 European standard. It performs both XML schema validation and Schematron business rule checks.
Using the official KoSIT validator ensures your invoices will be accepted by German public authorities and other recipients requiring XRechnung compliance. Our free online validator uses the same official validation engine.
XRechnung is the German national standard for electronic invoicing, mandatory for invoices to public sector entities since November 2020. It is based on the European EN 16931 standard and uses XML format (UBL or CII syntax). XRechnung ensures interoperability and compliance with EU Directive 2014/55/EU.
Learn more about the XRechnung Standard and XRechnung Field Reference.
EN 16931 is the European standard for the semantic data model of electronic invoices. It defines the core elements required for cross-border e-invoicing within the EU. XRechnung implements EN 16931 with additional German-specific rules (CIUS). Validation against EN 16931 ensures your invoices meet the minimum requirements for European e-invoicing.
When validating XRechnung invoices, you may encounter various error codes. Here are the most common issues:
KoSIT validation outputs schema checks (XML structure) and Schematron rules (business rules). Understanding both helps you fix issues quickly and ensure the invoice is accepted by recipients.
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Yes, our XRechnung validator is 100% free with no usage limits. We use the official KoSIT validation engine and do not require registration or payment.
Your invoice data is processed in your browser and on our secure servers. Files are not stored after validation and we do not share your data with third parties.
We validate XRechnung XML files in both UBL and CII (Cross-Industry Invoice) syntax formats. The maximum file size is 10MB.
Our validator checks against EN 16931 (European e-invoice standard), XRechnung 3.0 rules, and German-specific CIUS requirements. Both XML schema and Schematron business rules are validated.