Local XML viewer

View a KSeF FA(3) invoice like a normal document

Open a structured XML invoice and read it in a layout similar to a conventional invoice.

Open a file in the viewer

Which fields will you see?

How does it work?

Choose a file on your device and your browser reads it locally. The contents are not sent to any server. Once the structure is recognized, the app shows a readable summary, an element tree, and the formatted source XML.

Limitations

The viewer does not connect to KSeF, check a KSeF number, or perform official semantic or business validation.

Preview only. This tool does not confirm the document’s legal validity.