Convert between EU e-invoice formats

One JSON invoice model in, any EU e-invoice format out — every conversion validated against its target format's official rules before it's returned.

• Convert UBL 2.1 to UN/CEFACT CII
  Convert a Peppol/UBL invoice to UN/CEFACT Cross Industry Invoice (CII) syntax — required by Chorus Pro and many ERP back-ends.
• Convert UN/CEFACT CII to UBL 2.1
  Convert a CII (Cross Industry Invoice) document to Peppol-ready UBL 2.1 syntax.
• Convert UBL 2.1 to XRechnung 3.0
  Convert a generic EN 16931 UBL invoice to Germany’s mandatory XRechnung 3.0 B2G format.
• Convert UBL 2.1 to Factur-X (PDF/A-3)
  Convert a UBL invoice to Factur-X — a human-readable PDF/A-3 with the EN 16931 CII invoice embedded.
• Convert UN/CEFACT CII to Factur-X (PDF/A-3)
  Wrap a CII invoice into a Factur-X PDF/A-3 hybrid document — the same XML syntax Factur-X already embeds, plus a compliant PDF.
• Convert UN/CEFACT CII to XRechnung 3.0 (CII)
  Convert a generic CII invoice to Germany’s XRechnung 3.0, CII syntax variant.
• Convert XRechnung 3.0 to plain UBL 2.1
  Strip an XRechnung invoice down to plain EN 16931 UBL — useful when forwarding to a Peppol receiver that doesn’t need the German B2G-specific fields.
• Extract UBL 2.1 from a Factur-X PDF
  Extract the embedded structured invoice from a Factur-X/ZUGFeRD PDF and convert it to Peppol-ready UBL.