純本機私密執行的 XRechnung Viewer, Validator & PDF Renderer

Upload XRechnung 3.0 XML (CII or UBL) to get a human-readable invoice, validate all BR-DE-* business rules, check Leitweg-ID, view VAT breakdown, detect errors, and render a print-ready PDF. 100% 瀏覽器本機處理，無需註冊帳號，零伺服器上傳。