What it reads
The viewer renders invoices with the XRechnung visualization of KoSIT, the German coordination office behind XRechnung (release 2026-10-13). It works on the EN 16931 model, so it reads more than XRechnung:
- UBL 2.1 Invoice and CreditNote: XRechnung UBL, Peppol BIS Billing 3.0, EN 16931 UBL and the national rules built on it.
- CII D16B (UN/CEFACT Cross Industry Invoice): ZUGFeRD 2, Factur-X and XRechnung CII.
The invoice opens in tabs: an overview with the parties, totals and payment, the details of every line, supplements (notes, delivery, references), the attached files and a routing slip. Labels are in English or German.
ZUGFeRD and Factur-X PDFs
Open the PDF itself: the viewer takes the XML out of it (factur-x.xml, zugferd-invoice.xml or xrechnung.xml) in your browser and shows it. The PDF's pages are the seller's own picture of the invoice; the XML is what counts for tax, and what this page shows.
Printing and saving
Print or save as PDF opens your browser's print dialog for the rendered invoice; choose "Save as PDF" as the printer to get a file. Download HTML saves the page with its tabs. Files attached to the invoice (BT-125) can be saved one by one above it. A rendering is a copy for reading: the XML is the invoice to archive.
Viewing is not checking
The viewer shows what an invoice says, not whether it is right: an invoice with a missing field or a wrong total renders all the same. To check it against the XML Schema and the business rules of XRechnung, Peppol, Factur-X or EN 16931, open it in the validator. For the lines as a spreadsheet, use XML to CSV.
Questions
Is my invoice uploaded?
No. The XML is read, and taken out of the PDF, in your browser, and KoSIT's stylesheets run there with SaxonJS.
Is this the official XRechnung viewer?
It runs KoSIT's published visualization unchanged, the stylesheets behind many XRechnung viewers, in your browser instead of a desktop program.
Why does my invoice not show?
The viewer reads UBL Invoice and CreditNote and CII D16B. ZUGFeRD 1.0 (CrossIndustryDocument) and other formats, such as FatturaPA, are not supported.
Which languages are there?
English and German labels, from KoSIT's translations. The invoice's own text stays as written.
Other tools
- XML formatter: Pretty-print or minify XML, keeping text, CDATA and comments as written.
- XPath tester: Evaluate XPath 3.1 against a document and see each match with its line.
- XSD generator: Infer an XML Schema from sample documents, checked against them.
- XML from XSD: Generate a sample XML document from a schema, validated against it.
- XSLT transformer: Run XSLT 1.0, 2.0 or 3.0 on a document and see the result, the messages and the files it writes.
- XML diff: Compare two XML documents as trees: changed, added and removed elements, attributes and text.
- XML to JSON converter: Convert XML to JSON, with arrays where an element repeats or wherever its XSD allows.
- JSON to XML converter: Convert JSON to XML: @keys become attributes, arrays repeated elements.
- XML to CSV converter: Turn a repeating element into CSV rows: invoice lines, products, records.
- XML validator: check a document against XSD, DTD, RelaxNG or Schematron, up to 1 GB.