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Quba E-Invoice Viewer

Quba E-Invoice Viewer

Quba allows to visualize structured (=XML) or hybrid (PDF) e-invoices.


Quba-Viewer (homepage) is a cross platform open source application to display structured (i.e., XML) and hybrid (Factur-X/ZUGFeRD PDF) electronic invoices.

Documentation-wise there is a doc RE Architecture, Development, Debugging and testing in general and some Electron and E-Invoice peculiarities like interprocess (IPC) communication, XSLT and codelists in particular.


1.1.1 24.09.2021 - The window for the example files can now be closed - plain pdf without embedded xml not to show button for visualization
1.1.0 20.09.2021 - #6 New document shows still old data / invoice - Switch to vue.js - i18n: Support for EN and FR - support FX Referenzprofil XRechnung
1.0 23.08.2021 - #5 Codelists are now resolved - Support for first FX Extended Element, i.e., Cash Discount in XML
0.5 27.07.2021 - Support for PDF - Support for Factur-X/ZUGFeRD - Display errors as dialog instead of hiding them
0.2 10.06.2021 - Support for XRechnung (UBL) - "dark" theming - possibility to open multiple files at the same time in the same viewer (tabs) - print
0.1 2021-03-31 - Initial release - Support for XRechnung (UN/CEFACT CII) - release for Windows on 2021-03-31, for Linux on 2101-04-16 and for Mac on 2021-04-27


History of Quba

The FeRD had published visualization XSLTs for ZF1 (~=UN/CEFACT C13B) as open source, unfortunately the ones for the UN/CEFACT C16B-based version 2 remains proprietary. The Kosit released XSLT for both CII and UBL of the XRechnung (XR) which has been used for various online viewers but also for offline viewers like Ultramarinviewer and Open XRechnung Toolbox. Quba uses this work added translations and at least experimental support for Factur-X/ZUGFeRD profiles higher than EN16931.

Known issues

  • While XRechnung, EN16931 and below should work, not all FX attributes/elements of the Extended Profile have yet been mapped, feel free to report missing ones
  • The example window can currently not be closed

Something missing? Edit this app.

Keyboard Shortcuts

Key Action
/ Focus the search bar
Esc Focus the search bar and cleans it
Select the next search result
Select the previous search result
Enter Open the selected search result
cmdEnter Ctrl+Enter Open the selected search result in a new tab