Peppolio
UBL CII EN 16931

UBL to CII Converter

Have a UBL invoice, but a counterparty whose system speaks UN/CEFACT CII? Drop the file in and get the CII version back, with every field carried across intact.

Drop a UBL invoice file here, or click to pick one.

When you would reach for this

Peppol runs on UBL, but not every system does. This converter bridges the gap to the CII syntax without losing anything in translation.

The Same Invoice, Two Syntaxes

UBL and CII both express the EN 16931 model, so parties, line items, tax groups, and totals move across term for term. Nothing is retyped or approximated.

Speaks to CII-Only Systems

Some accounting suites and hybrid-PDF formats accept only CII. This gives you a clean CII file to hand them, starting from the UBL you already have.

Nothing Leaves Our Memory

Your XML is handled in memory over an encrypted connection and dropped the instant the conversion returns. No copies, no logs of your data.

One Drop, One Download

No setup, no account to create. Drop the UBL file, and the CII XML is ready to download a moment later.

How It Works

Three steps from a UBL file to its CII equivalent.

Step 1

Drop In the UBL File

Add your UBL invoice XML, by drag and drop or a quick browse.

Step 2

We Remap the Data

The converter reads the EN 16931 terms out of your UBL document and writes them back out as a UN/CEFACT Cross Industry Invoice.

Step 3

Take the CII File

The CII XML downloads right away, ready for whatever system asked you for it.

Frequently Asked Questions

What to know before converting UBL to CII.

They are two ways of writing the same thing. Both encode the EN 16931 European invoice model in XML; UBL is the syntax the Peppol network carries, while CII (Cross Industry Invoice) is the UN/CEFACT syntax that hybrid formats such as Factur-X and ZUGFeRD are built on.
No. Because both syntaxes cover the same set of business terms, every value maps straight across. UBL to CII is the safe direction in particular, since CII does not require fields that a valid UBL invoice would be missing.
Hand it to whatever asked for CII: an accounting system that only ingests UN/CEFACT, or a tool that embeds CII into a hybrid PDF. You can also keep it next to the UBL original as an archive copy.
UBL 2.1 invoices that follow EN 16931, including Peppol BIS Billing 3.0 documents.
Never. The file is processed in memory over an encrypted connection and discarded the moment the CII is returned to you.
Every e-invoicing task covered

One toolkit for the whole job

Prefer a classic tool over chat? Each task has its own one-click page.

AI Assistant

Chat in plain language to create, convert and validate your e-invoices.

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Create

Build a compliant Peppol invoice with a guided form, no jargon involved.

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Edit UBL Invoice

Fix a rejected or invalid UBL invoice: upload it, edit any field, and download a valid file.

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Validate

Check any UBL invoice against EN 16931 and the Peppol BIS 3.0 rules.

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Convert

Turn PDF, Word or Excel invoices into Peppol-ready UBL in seconds.

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UBL Viewer

Open a Peppol or UBL invoice in your browser and read it like paper.

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UBL to PDF

Turn UBL XML into a clean, printable PDF you can actually read.

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UBL to CII

Convert a UBL invoice into UN/CEFACT CII XML for systems that need it.

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CII to UBL

Convert CII XML into UBL, the syntax the Peppol network runs on.

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Extract Attachments

Pull every embedded file out of a UBL or Peppol invoice as a ZIP.

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EN 16931 & Peppol BIS 3.0 compliant Results in seconds No installation Data never stored
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