Rekenbox · Checks
UBL invoice viewer and arithmetic checker
Invoice data, lines, VAT and totals from UBL XML.Clarity for your records
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Understand your result
How this tool works
The viewer reads invoice data from UBL XML and shows lines, VAT and totals. It checks arithmetic and data-related inconsistencies. A complete UBL or Peppol validation also requires checking the applicable schemas and business rules.
Common questions
Does a successful result mean Peppol approval?
No. Rekenbox checks data and arithmetic consistency, not full XSD or Peppol conformance. Use an appropriate validator for that purpose.
Can I open a credit note?
Yes. It supports UBL 2.1 Invoice and CreditNote XML up to 10 MB. An arbitrary XML format or PDF is not a supported UBL file.
Which details do you need?
- Choose a file — UBL 2.1 Invoice or CreditNote (XML), up to 10 MB.
Limits of this tool
- Technical check; the source file stays unchanged. A consistent export does not prove that all entries are correct or complete for tax purposes.
- Checks data and arithmetic consistency; does not certify Peppol or XSD conformance.
Year: 2026 · Version 2026.1
Sources for this tool
- Belastingdienst — factuureisen · calculation source checked 2026-09-04
Prepared by the Rekenbox product team at Winstwaker. The listed source references and calculation version make the method traceable. Report a content error Last updated: 2026-09-04. Rekenbox is a product by Winstwaker. The tool applies a calculation model to your inputs; a result or paid report is not a personal assessment by an adviser.