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Create a UBL invoice

Create a single UBL 2.1 invoice from a form, validated against EN 16931 before download. No accounting software needed. One credit per invoice.

Invoice

Use the reference your buyer requires, such as a Leitweg-ID for a German public-sector recipient.

From (seller)

Two letters, for example DE, FR or NL.

XRechnung needs the seller's contact name and telephone.

XRechnung needs the seller's contact name and telephone.

The seller's electronic address, with its scheme, for example an email address or Peppol ID.

The register the address belongs to. Klarbon suggests one from the country and the address, and you can change it.

For example a SIREN in France, a KVK number in the Netherlands or an enterprise number in Belgium.

To (buyer)

Two letters, for example DE, FR or NL.

The buyer's electronic address, for example a Peppol ID. Enter a Leitweg-ID in Buyer reference if your public-sector recipient requires one.

The register the address belongs to. Klarbon suggests one from the country and the address, and you can change it.

For example a SIREN in France, a KVK number in the Netherlands or an enterprise number in Belgium.

Lines and totals

  1. Line total €0.00

Total before VAT
€0.00
VAT 0%
€0.00
Amount due
€0.00
Payment
Format

You see the result and every check before you pay.

In short

Fill in one form and get an e-invoice checked against the selected rules, for the few you send a year. Free preview, then 1 credit (€4.99).

Klarbon creates a single UBL 2.1 invoice from a form: enter your details, your customer's, the lines and the payment terms, and download an XML invoice validated against the European standard EN 16931. If your customer needs Peppol BIS or XRechnung in UBL syntax, choose that specification and Klarbon checks the selected rules. XRechnung also has a CII syntax. One credit per invoice; the preview is free.

How do I create a UBL invoice?

  1. Choose the specification: plain EN 16931 UBL, Peppol BIS Billing 3.0 or XRechnung. If a field the specification requires is missing, the check says so before you pay.
  2. Enter seller and buyer: names, addresses, VAT numbers, and electronic addresses for Peppol.
  3. Add the lines: description, quantity, unit, price and VAT rate. Klarbon calculates the totals.
  4. Add the payment details: payment means, IBAN and due date.
  5. Validate and download. Klarbon writes UBL 2.1 and checks it. One credit unlocks the download.

Which UBL does my customer want?

UBL is an XML syntax from OASIS (OASIS UBL 2.1). Ask the recipient which specification and profile its software or portal requires. Peppol BIS Billing 3.0 (OpenPeppol) and XRechnung in UBL are distinct choices; the recipient's country alone does not tell you which to select. If they name a CustomizationID, use that. More in what is UBL.

How do I send it?

As your customer asks: through your Peppol provider for a Peppol BIS invoice, through a portal, or by email. Klarbon does not send invoices or keep an archive.

What does Klarbon not do?

It keeps no customer list, numbering or archive. You choose the invoice number and keep the file. It does not give tax advice.

What happens to the data I enter?

It is processed on Klarbon's servers to write and validate the file, then deleted. See what happens to my files.

What does it cost?

One credit per invoice: EUR 4.99 including VAT, ten for EUR 29, fifty for EUR 99. The form and the validated preview are free. See prices.

Frequently asked questions

How do I create a UBL invoice?

Fill in Klarbon's form with your details, your customer's, the lines and the payment details, choose the UBL specification, and download the XML once it has passed validation. It costs one credit.

Which UBL version does Klarbon write?

UBL 2.1, the version EN 16931, Peppol BIS and XRechnung use.

My customer wants UBL for Peppol. Which option do I choose?

Peppol BIS Billing 3.0. It is UBL with the Peppol rules and the electronic addresses the network needs.

Can people read a UBL file?

Not directly; it is XML for software. Your customer's software reads it, and anyone can view it in an e-invoice viewer.

Sources

Updated 6 November 2026