Quba is a
e-Invoice-Viewer

Open-source / Free / Cross-Platform

Viewer for electronic invoices

We are Quba

Mustang's focusses on the creation, validation and parsing of electronic invoices. Validation also re-calculates important parts of these invoices. Quba covers the visual display for manual checks.

Quba 1.1.2

Quba 1.1.2 has been released today, 11 November 2021, and adds support to drag&drop invoices onto the main screen.

More »

Quba 0.2 with UBL-support

Version 0.2 of Quba was released on 2021-06-10 synchronously for Windows, Mac and Linux. It features the support for UBL files, apart from UN/CEFACT CII

More »

What about the name? Apart from being the name of a city in Azerbaijan, it also is the name of the horse breed originating from there. This name, like other horse names (Konic, Mustang) is a homage to the initiator of Factur-X / ZUGFeRD, the Forum of the Electronic Invoice Germany (“FeRD”, an accoustic allusion to the German word for horse).

Thank you for your support with the development of version 1.0

From now on community support and news are available via the ZUGFeRD Google Group.