Get ZUGFeRD
CII UBL EN 16931

Turn CII XML into UBL XML

Hand over a UN/CEFACT Cross Industry Invoice (CII) and get back a UBL invoice, the syntax that dominates the Peppol network. Free of charge and ready in moments.

Drop a CII XML file in this area, or click anywhere to pick one from your device.

Meets the standards EN 16931 ZUGFeRD / Factur-X XRechnung KoSIT GoBD Archive PDF/A-3

How It Works

Take a CII invoice to UBL XML in just three quick steps.

Step 1

Add Your CII XML

Drop your UN/CEFACT Cross Industry Invoice (CII) XML onto the page, or click to locate it on your computer.

Step 2

Hands-Free Transcoding

The converter parses the EN 16931 content of your CII file and rewrites it as a UBL 2.1 invoice, primed for Peppol BIS Billing 3.0.

Step 3

Save Your UBL XML

The UBL XML is delivered straight away, set to travel through a Peppol access point or feed into any UBL-driven system.

Why switch from CII to UBL?

Take the CII syntax that ZUGFeRD and Factur-X rely on and recast it as the UBL syntax that the majority of Peppol access points are set up to receive.

Standards-True EN 16931 Mapping

CII and UBL render the same EN 16931 semantic model in different syntaxes. Each business term, trading party, invoice line and VAT breakdown is carried over one to one, never retyped.

Made for Sending over Peppol

Most Peppol access points are built around UBL. Recast your CII invoice into UBL so it slots straight into the network and reaches your trading partners.

Confidential by Default

Every file is handled in memory across an encrypted TLS channel and is wiped as soon as the response is returned, so nothing lingers on our infrastructure.

Free and Immediate

Skip the downloads, add-ons and sign-up forms. Hand over your CII XML and grab the finished UBL document right away.

Frequently Asked Questions

Key answers about taking your invoices from CII across to UBL.

Both CII (Cross Industry Invoice) and UBL (Universal Business Language) are XML representations of the same EN 16931 European invoice model. CII is the syntax tucked inside ZUGFeRD and Factur-X, while UBL is what you typically see on Peppol BIS.
You get valid EN 16931 UBL out of it. Peppol delivery may still call for electronic addresses, namely seller and buyer Endpoint IDs with a scheme, which Peppol BIS Billing 3.0 mandates. Where your CII left these out, supply them before dispatch.
It does not. Because each syntax holds the same EN 16931 business terms, no part of your invoice goes missing. The single exception is the Peppol electronic address requirement described just above.
The tool accepts EN 16931 Cross Industry Invoice documents, the CII pulled from ZUGFeRD and Factur-X invoices included.
Absolutely. Files are processed entirely in memory over TLS 1.3, never written to our servers, and removed the instant the conversion finishes.
GoBD Archive

Issuing e-invoices? You must archive them properly.

Since 2015, the GoBD, the tax office's rules for digital records, have applied to every business, freelancers included: digital invoices must be kept as the original file, unchanged, exportable and readable for the whole 8-year retention period. With the e-invoicing mandate a print no longer counts. Our archive takes care of it for you.

  • Every invoice stored exactly as it arrived: XML, PDF or photo
  • Locked against changes, so nothing can be altered afterwards
  • A second copy in another German data centre
  • Find any invoice by date and export it with an index for your tax advisor
  • Team access: several team members can work in the same archive
  • No ERP, no installation: right next to your e-invoicing tools
Discover the GoBD archive See plans
Built for the German mandate

One toolkit for ZUGFeRD and XRechnung

Every German business has had to accept e-invoices since January 2025. Both formats are covered here.

ZUGFeRD or XRechnung? Let the assistant pick the tool Tell the chat what you need: it converts, checks, builds, and reads out German e-invoices. Open assistant

Create

Fill one form, get a ZUGFeRD PDF or an XRechnung with Leitweg-ID
Create ZUGFeRD PDF ZUGFeRD PDF The guided form turns your details into a ZUGFeRD or XRechnung invoice. Create XRechnung XRechnung Generate a valid XRechnung with Leitweg-ID, ready for public-sector buyers. Create Order-X Order-X PDF Create an Order-X order file: the ZUGFeRD hybrid principle applied to purchase orders. ZUGFeRD Credit Note ZUGFeRD PDF Cancel or correct an e-invoice you already sent with a ZUGFeRD credit note. XRechnung Credit Note XRechnung Create an XRechnung credit note with Leitweg-ID for public-sector buyers.

Check & repair

Test against EN 16931 and the XRechnung CIUS, then fix what a buyer rejected
Validate ZUGFeRD ZUGFeRD PDF Run EN 16931 checks on your ZUGFeRD invoices before DATEV or your customer does. Validate XRechnung XRechnung Check XRechnung XML against EN 16931 and the German CIUS rules. Validate Order-X Order-X Run incoming and outgoing Order-X orders through the official Order-X 1.0 checks. Edit ZUGFeRD Invoice ZUGFeRD PDF Repair a refused or broken invoice: upload it, correct the fields, and get a valid file back. Edit XRechnung XRechnung Open an XRechnung as a form, fix the Leitweg-ID or any rejected field, and download a valid file.

Convert

Move an invoice between PDF, CII, UBL and XRechnung
PDF to ZUGFeRD PDF ZUGFeRD Any PDF, Word, or Excel invoice goes in; a ZUGFeRD or XRechnung file comes out. PDF to XRechnung PDF XRechnung Convert a PDF invoice to a valid XRechnung with Leitweg-ID for public-sector buyers. CII to ZUGFeRD CII ZUGFeRD Package existing CII XML as a ZUGFeRD PDF/A-3 hybrid invoice. Embed XML to PDF CII PDF ZUGFeRD Marry a PDF and its CII XML into one ZUGFeRD-compliant hybrid invoice. CII to UBL CII UBL Transform a CII invoice into UBL XML, the syntax most Peppol networks expect. UBL to CII UBL CII Map a UBL invoice to UN/CEFACT CII XML, ready to embed in ZUGFeRD or Factur-X. XRechnung to PDF XRechnung PDF See any CII, UBL, or XRechnung XML as a tidy, printable PDF.

Open & extract

Open a file, see what is inside it, and take the data with you
Extract XML PDF CII Pull structured XML straight out of any PDF invoice with AI-driven OCR. Extract Attachments ZUGFeRD XRechnung Pull every embedded file out of a ZUGFeRD or XRechnung invoice as a ZIP. XRechnung Viewer XRechnung CII UBL Open e-invoice XML in your browser and read it like a paper invoice. ZUGFeRD Viewer ZUGFeRD PDF Open a ZUGFeRD PDF and read the embedded invoice data your software books.

Look up & automate

Check who you are invoicing, or move the whole flow to an API
Check VAT Number Check any EU VAT number against VIES and get the customer's Peppol address. Developer API, MCP and automation Automate invoice generation and validation end to end.
Ready for mandatory e-invoicing?

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EN 16931 & PDF/A-3b compliant Results in seconds No installation GoBD-compliant archive
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