Get ZUGFeRD
UBL CII EN 16931

Turn UBL XML into CII XML

Drop in a UBL invoice and receive a UN/CEFACT Cross Industry Invoice (CII) document, the very syntax that powers ZUGFeRD, XRechnung and Factur-X. Instant and free of charge.

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

Step 1

Add Your UBL XML

Drop your UBL invoice 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 UBL file and rewrites it as a UN/CEFACT Cross Industry Invoice (CII), ready for ZUGFeRD workflows.

Step 3

Save Your CII XML

The CII XML is delivered straight away, set to be embedded in a ZUGFeRD or Factur-X PDF or checked against EN 16931.

Why switch from UBL to CII?

Step away from the Peppol UBL syntax and into the CII syntax that underpins ZUGFeRD, XRechnung and Factur-X, the formats at the heart of German e-invoicing.

Standards-True EN 16931 Mapping

UBL and CII express 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.

Primed for ZUGFeRD and Factur-X

The CII document is exactly what sits inside a ZUGFeRD or Factur-X hybrid PDF. Producing it is the first link in the chain toward a compliant German e-invoice.

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 UBL XML and grab the finished CII document right away.

Frequently Asked Questions

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

Both UBL (Universal Business Language) and CII (Cross Industry Invoice) are XML representations of the same EN 16931 European invoice model. You will mostly meet UBL on Peppol BIS, whereas CII is the syntax tucked inside ZUGFeRD and Factur-X.
It does not. Since both syntaxes hold the identical EN 16931 business terms, every field travels across intact. UBL to CII is the low-risk direction too, because CII profiles introduce no required fields that UBL is missing.
Use our embed and CII tools to wrap it inside a PDF as a ZUGFeRD or Factur-X hybrid invoice, or run it through an EN 16931 validation check.
The tool handles UBL 2.1 invoices aligned with EN 16931, Peppol BIS Billing 3.0 documents 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?

Make every invoice compliant, in a single message

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