On the occasion of this year’s ZUGFeRD developer days, we are published Quba 2.0 already Thursday last week, 15 October 2026.
Quba 2, the cross platform open source offline e-invoice viewer, now also supports offline validation of electronic invoices, the creation of Factur-X/ZUGFeRD files, if a PDF/A basis file is present, and is now based directly on Mustangproject.