Ultramarin eRechnung Viewer

Ultramarin eRechnung Viewer at a glance

Ultramarinviewer is a free Windows application for displaying structured electronic invoices in the German XRechnung and European CEN invoice formats. It is primarily used by accountants, tax advisors, public sector staff, and IT administrators who need to review or archive incoming e-invoices without manually parsing the underlying XML data. The application runs entirely locally and requires no internet access, which is valued for data protection and security reasons in administrative offices and accounting firms.

For sysadmins, the tool becomes relevant mainly when deployed centrally on workstations or in terminal server environments. As it is a lightweight standalone application without an auto-update mechanism, new versions must be downloaded and distributed manually, for example through internal software deployment tools or package managers such as winget.

New releases appear irregularly and typically include bug fixes for the display of specific invoice fields or support for new extensions of the XRechnung standard. When updating, administrators should check whether supported invoice formats or variants have changed, since the software is limited to visualization and does not offer additional functions such as invoice editing.