Convert PDF to UBL API
UBL 2.1 XML — the Peppol-native format for cross-border e-invoicing across Europe, Australia, Singapore, and global networks. Try the REST API demo — no code required. Drop a PDF to see exactly what InvoiceXML returns.
Drop a PDF to test the API
or browse files to upload
REST API demo · POST /transform/to/ubl · PDF · Max 20 MB
From Messy Scanned PDF to Compliant XML
See exactly how your invoices are transformed — automatically.
PDF Invoice
Unstructured
Legacy / scanned PDF with no embedded data
AI Extraction
Processing
OCR & AI extraction with confidence scores
Data Mapping
Structuring
Data mapped to selected compliance schema
Compliant Output
Validated ✓
All validation checks passed (XSD + Schematron)
Why UBL and Peppol Compliance Matter
UBL 2.1 is the XML backbone of the Peppol network — the global infrastructure connecting millions of businesses and government entities. Peppol BIS Billing 3.0 mandates UBL 2.1 as its invoice format and is required for public sector invoicing in Norway, Denmark, Sweden, Singapore, Australia, and New Zealand. With Peppol adoption expanding rapidly across the EU and beyond, converting your PDF invoices to UBL ensures you can reach any buyer on the network — without manual data entry or format conversion at the other end.
Built for Developers
A single REST endpoint. Send a PDF, receive structured XML. Built for ultra-high concurrency and sub-second processing.
- Supports all formats: DOCX, XLSX, PDF, images — no preprocessing needed
- Works on scanned and photographed invoices
- Every response validated against official Schematron rules
Supports ZUGFeRD · Factur-X · XRechnung · UBL · CII · EN 16931
API Documentation$ curl -X POST https://api.invoicexml.com/v1/transform/to/ubl \ -H "Authorization: Bearer sk_live_..." \ -H "Content-Type: multipart/form-data" \ -F "[email protected]" // => 200 OK // => { "id": "inv_8f3k...", "status": "completed" }
Complete UBL Toolkit
Everything you need to create, convert, validate, and preview UBL invoices — via REST API or online.
Build a validated UBL 2.1 XML from structured data — Peppol BIS Billing 3.0 compliant.
Validate UBL XML against EN 16931 and Peppol BIS Billing 3.0 Schematron rules.
Convert any PDF invoice into a Peppol-compliant UBL 2.1 XML using AI extraction.
Render a UBL XML as a human-readable PDF for review and approval.
Frequently Asked Questions
What is UBL?
UBL (Universal Business Language) is an OASIS XML standard for electronic business documents. UBL 2.1 is one of the two official syntaxes of the European EN 16931 e-invoicing standard and is the native format of the Peppol network.
What is Peppol and why does it matter?
Peppol (Pan-European Public Procurement On-Line) is a global network for exchanging e-invoices. It is mandatory for public sector invoicing in Norway, Denmark, Sweden, Singapore, Australia, and New Zealand, and is increasingly adopted for B2B in the Netherlands, Belgium, Italy, and more.
How does UBL differ from CII?
Both UBL and CII are valid EN 16931 syntaxes. UBL 2.1 is used by Peppol BIS Billing 3.0 and is the dominant format on the Peppol network. CII is used by ZUGFeRD and Factur-X. Use UBL when your recipients or network is Peppol-based.
Is the output Peppol BIS Billing 3.0 compliant?
Yes. Our converter generates UBL 2.1 invoices that conform to the Peppol BIS Billing 3.0 specification, validated against both EN 16931 and Peppol-specific business rules.