XRechnung Validation Without Java: A Free Browser-Based Alternative

If you've ever tried to validate an XRechnung file, you've probably ended up at the KoSIT validator - a Java command-line tool that requires a JDK, a specific configuration file, and about 45 minutes of setup before you can validate your first invoice. There's a faster way. What is XRechnung? XRechnung is Germany's national e-invoicing standard, based on UBL 2.1 and the European norm EN 16931. It has been mandatory for invoices submitted to German federal public authorities since November 2020,