Group: GitHub Jstaerk Mustangproject
1.Library to Write, Read and Validate E Invoices (Factur X, ZUGFeRD and to A Limited Extend XRechnung/CII).2 usages
com.github.jstaerk.mustangproject » library Apache
The Mustang project is a java library to read, write and validate Factur-X/ZUGFeRD meta data inside your invoice PDFs. To write files, a provided PDF/A will be combined with generated or provided XML.
Last Release on Jul 13, 2026
2.E Invoices Commandline Tool, Allowing to Create(embed), Split and Validate Factur X/ZUGFeRD Files. Validation Should Also Work For XRechnung/CII.1 usages
com.github.jstaerk.mustangproject » Mustang-CLI Apache
Open Source Java e-Invoicing library, validator and tool (Factur-X/ZUGFeRD, UNCEFACT/CII XRechnung)
Last Release on Feb 19, 2026
3.Library to Validate E Invoices (ZUGFeRD, Factur X and Xrechnung)1 usages
com.github.jstaerk.mustangproject » validator Apache
Open Source Java e-Invoicing library, validator and tool (Factur-X/ZUGFeRD, UNCEFACT/CII XRechnung)
Last Release on Feb 19, 2026