# UBL Explainer

UBL Explainer is a browser-based toolkit for understanding, validating and troubleshooting UBL and Peppol invoice XML files.

The site helps developers, finance teams, accountants and e-invoicing implementers understand common UBL invoice errors in plain English.

All tools run locally in the browser. Invoice XML files are not uploaded.

## Main tools

- https://ublexplainer.com/ubl-validator
  Validate UBL invoices and explain common XML, totals, VAT and Peppol-related issues.

- https://ublexplainer.com/ubl-viewer
  View UBL XML invoices as readable invoice summaries.

- https://ublexplainer.com/embedded-pdf-checker
  Check whether a UBL invoice contains a valid embedded PDF attachment using EmbeddedDocumentBinaryObject.

- https://ublexplainer.com/ubl-totals-checker
  Check invoice line totals, VAT totals, TaxExclusiveAmount, TaxInclusiveAmount and PayableAmount.

- https://ublexplainer.com/ubl-vat-checker
  Check VAT categories, VAT percentages, taxable amounts and tax totals.

- https://ublexplainer.com/ubl-field-explainer
  Understand common UBL fields such as CustomizationID, ProfileID, TaxTotal, LegalMonetaryTotal and EmbeddedDocumentBinaryObject.

- https://ublexplainer.com/peppol-bis-checker
  Check common Peppol BIS Billing 3.0 invoice issues.

## Privacy

All invoice processing happens locally in the browser. UBL Explainer does not upload invoice XML, embedded PDFs or invoice data.

## Important disclaimer

UBL Explainer provides browser-based checks and plain-English explanations. It is not an official Peppol certification validator.