UBL / Peppol Invoice Viewer

From XML to a readable invoice

Invoices exchanged over Peppol are UBL 2.1 XML files following Peppol BIS Billing 3.0, the format for Belgian B2B e-invoicing since 1 January 2026. Your accounting software reads them automatically, but a person opening the raw XML sees hundreds of tags. This viewer turns the file into an invoice layout in your browser:

• Seller and buyer with name, address, VAT number, enterprise number and Peppol endpoint, each checked (0208, 9925, BE...).
• Lines with quantity, unit code, net price, line amount and VAT category and rate.
• VAT breakdown and totals, with the arithmetic recomputed: line sums, VAT per rate, total with VAT, prepaid and amount due.
• Payment: IBAN with the Belgian bank name and BIC, due date, and the payment reference checked as OGM or RF.
• Attachments: an embedded PDF (base64 in cac:AdditionalDocumentReference) can be downloaded in one click.

Sample: what a few XML elements become

<cbc:ID>INV-2026-0042</cbc:ID>                  → Invoice INV-2026-0042
<cbc:EndpointID schemeID="0208">0417497106</...>  → Peppol 0208:0417497106 ✓
<cbc:InvoicedQuantity unitCode="HUR">8</...>       → 8 hours
<cac:ClassifiedTaxCategory><cbc:ID>S</cbc:ID>
  <cbc:Percent>21</cbc:Percent>                   → VAT S 21%
<cbc:PaymentID>+++090/9337/55493+++</...>        → OGM ✓
<cbc:PayableAmount currencyID="EUR">1210.00</...> → Amount due € 1,210.00

Edge cases

• Credit notes have CreditNote as root and CreditedQuantity on lines; the viewer labels them clearly so they are not booked as invoices.
• Unit codes follow UN/ECE Recommendation 20 (C62 piece, HUR hour, DAY day); unknown codes are shown as is.
• Prepaid amounts and allowances at document level change the amount due without changing the lines.
• Non-Belgian parties are shown with their own scheme; only Belgian identifiers get checksum checks.

For a full rule-by-rule check use the Peppol validator; to put lines into a spreadsheet use UBL to JSON/CSV; to audit a folder of invoices use the Peppol batch auditor. The Peppol and UBL guide explains the format.