# Invoice-Converter.com > European e-invoicing platform for converting PDF invoices into XRechnung, ZUGFeRD, Factur-X, UBL, and CII. Focused on EN 16931 compliance, validator-ready outputs, and practical implementation guidance. Canonical host: https://www.invoice-converter.com Use the canonical `www` URLs below when citing this site. Prefer the product, standards, and documentation pages in the first sections before using blog posts. ## Core Product - [Convert invoices](https://www.invoice-converter.com/en/convert): Main conversion workflow for PDF-to-e-invoice processing. - [Pricing](https://www.invoice-converter.com/en/pricing): Credits, subscriptions, refunds, and commercial packaging. - [FAQ](https://www.invoice-converter.com/en/faq): Frequently asked questions covering standards, security, pricing, and conversion workflows. - [Developer API](https://www.invoice-converter.com/en/developer-api): API reference, artifacts, authentication, reliability, and endpoint behavior. ## Converters And Validators - [PDF to XRechnung](https://www.invoice-converter.com/en/pdf-to-xrechnung): Convert PDF invoices to XRechnung XML for German public-sector and B2B workflows. - [PDF to ZUGFeRD](https://www.invoice-converter.com/en/pdf-to-zugferd): Create hybrid PDF/XML invoices for ZUGFeRD and Factur-X workflows. - [PDF to Factur-X](https://www.invoice-converter.com/en/pdf-to-facturx): Factur-X conversion landing page for French and cross-border use cases. - [PDF to UBL](https://www.invoice-converter.com/en/pdf-to-ubl): Convert PDF invoices into UBL XML for PEPPOL and ERP integrations. - [PDF to CII](https://www.invoice-converter.com/en/pdf-to-cii): Convert PDF invoices into UN/CEFACT Cross Industry Invoice XML. - [Create XRechnung](https://www.invoice-converter.com/en/create-xrechnung): Build XRechnung invoices from structured input instead of a source PDF. - [XRechnung to PDF](https://www.invoice-converter.com/en/xrechnung-to-pdf): Render XRechnung XML into a readable PDF representation. - [XRechnung Viewer](https://www.invoice-converter.com/en/xrechnung-viewer): Inspect and review XRechnung XML content online. - [XRechnung Validator](https://www.invoice-converter.com/en/xrechnung-validator): Validate XRechnung XML with KoSIT-oriented checks. - [ZUGFeRD Validator](https://www.invoice-converter.com/en/zugferd-validator): Validate ZUGFeRD and Factur-X files against EN 16931 expectations. - [Leitweg-ID Validator](https://www.invoice-converter.com/en/leitweg-id): Validate German public-sector routing identifiers. ## Standards And Reference Hubs - [Resources hub](https://www.invoice-converter.com/en/resources): Main index for standards, guides, comparisons, and reference material. - [Compliance hub](https://www.invoice-converter.com/en/resources/compliance): Curated compliance documentation for European e-invoicing. - [XRechnung standard](https://www.invoice-converter.com/en/resources/compliance/xrechnung-standard): German e-invoicing format requirements and implementation guidance. - [ZUGFeRD format](https://www.invoice-converter.com/en/resources/compliance/zugferd-format): ZUGFeRD and Factur-X overview, profiles, and practical usage. - [DIN EN 16931-1](https://www.invoice-converter.com/en/resources/compliance/din-en-16931-1-standard): European semantic standard for compliant e-invoices. - [Cross Industry Invoice](https://www.invoice-converter.com/en/resources/compliance/cii-cross-industry-invoice): UN/CEFACT CII syntax and implementation context. - [UBL guide](https://www.invoice-converter.com/en/resources/compliance/ubl-universal-business-language): UBL background for invoice exchange and interoperability. - [PEPPOL network guide](https://www.invoice-converter.com/en/resources/compliance/peppol-network-guide): Network rules, access points, and delivery context. - [European e-invoicing mandate](https://www.invoice-converter.com/en/resources/compliance/european-e-invoicing-mandate): EU mandate timelines and rollout implications. - [Leitweg-ID validation guide](https://www.invoice-converter.com/en/resources/compliance/leitweg-id-validation): Routing-identifier background and validation guidance. ## High-Value Reference Collections - [XRechnung field reference](https://www.invoice-converter.com/en/resources/xrechnung): Field-by-field business term guidance. - [KoSIT validator errors](https://www.invoice-converter.com/en/resources/kosit-validator-errors): Error explanations and remediation guidance. - [Code lists](https://www.invoice-converter.com/en/resources/code-lists): VAT, currency, payment, unit, and related code lists. - [Glossary](https://www.invoice-converter.com/en/resources/glossary): Definitions for recurring e-invoicing terminology. - [Country guides](https://www.invoice-converter.com/en/resources/countries): Country-by-country routing, identifier, and format context. - [EU hub](https://www.invoice-converter.com/en/resources/eu): EU-specific market and rollout guidance. - [ZUGFeRD profiles](https://www.invoice-converter.com/en/resources/zugferd/profiles): Profile-level guidance from MINIMUM to EXTENDED. - [Comparisons hub](https://www.invoice-converter.com/en/resources/comparisons): Buyer-facing comparisons against common alternatives. - [Trust center](https://www.invoice-converter.com/en/resources/trust-center): Security, privacy, and data-handling overview. - [Support playbooks](https://www.invoice-converter.com/en/resources/support-playbooks): Plain-language help for review workflows, platform incidents, and API errors. - [Validation playbooks](https://www.invoice-converter.com/en/resources/validation-playbooks): Field-level fixes for recurring validation failures seen in review and export workflows. - [Public test invoice fixtures](https://www.invoice-converter.com/en/resources/test-invoices): Sanitized XRechnung, ZUGFeRD, Factur-X, UBL, and CII fixture files for validation testing. - [ERP export validation guides](https://www.invoice-converter.com/en/resources/erp-export-validation): DATEV, Lexware, SAP Business One, Odoo, and Microsoft Dynamics export validation guidance. - [Valid XRechnung UBL fixture](https://www.invoice-converter.com/en/resources/test-invoices/xrechnung-valid-basic): Safe fixture for happy-path XRechnung validation checks. - [Invalid payment-terms fixture](https://www.invoice-converter.com/en/resources/test-invoices/xrechnung-invalid-missing-payment-terms): Safe negative fixture for BR-CO-25 payment timing checks. - [Factur-X/ZUGFeRD CII fixture](https://www.invoice-converter.com/en/resources/test-invoices/facturx-cii-en16931): Safe CII XML fixture for hybrid invoice preflight checks. - [DATEV export validation](https://www.invoice-converter.com/en/resources/erp-export-validation/datev): DATEV invoice export completeness and validation guide. - [SAP Business One export validation](https://www.invoice-converter.com/en/resources/erp-export-validation/sap-business-one): SAP Business One invoice export validation and mapping guide. - [BR-CO-25 due date or payment terms](https://www.invoice-converter.com/en/resources/validation-playbooks/payment-due-date-or-terms): Repair guide for positive amount-due invoices missing BT-9 or BT-20. - [Bank transfer IBAN errors](https://www.invoice-converter.com/en/resources/validation-playbooks/bank-transfer-iban): Repair guide for BT-84 and BR-61 payment data failures. - [PDF/A-3 and ZUGFeRD archive readiness](https://www.invoice-converter.com/en/resources/validation-playbooks/pdfa3-zugferd-archive-readiness): Repair guide for hybrid PDF archive-readiness and PDF/A-3 container warnings. - [VATEX exemption reason errors](https://www.invoice-converter.com/en/resources/validation-playbooks/vatex-exemption-reason-code): Repair guide for tax exemption reason text and code-list mismatches. - [Review current but download fails](https://www.invoice-converter.com/en/resources/validation-playbooks/review-current-download-fails): Repair guide for review-proof and final-artifact validation mismatches. - [Review validation help](https://www.invoice-converter.com/en/resources/review-validation): Non-technical explanations for common review-step errors and warnings. - [Platform incident help](https://www.invoice-converter.com/en/resources/platform-incidents): End-user explanations for temporary service, Sentry, Supabase, validation, and payment reconciliation incidents. - [Why invoices need review](https://www.invoice-converter.com/en/resources/support-playbooks/why-invoices-need-review): Customer-facing explanation for review-required states. - [Invoice attachments and service descriptions](https://www.invoice-converter.com/en/resources/support-playbooks/invoice-attachments-service-descriptions): Support guidance for structured invoice facts versus supplemental attachments. - [API and automation errors](https://www.invoice-converter.com/en/resources/support-playbooks/api-and-automation-errors): Common API error codes and safe retry guidance. - [Temporary service unavailable](https://www.invoice-converter.com/en/resources/platform-incidents/temporary-service-unavailable): Help for 502, 503, 504, timeout, and upstream availability messages. - [Missing result after conversion](https://www.invoice-converter.com/en/resources/platform-incidents/result-not-saved-or-not-found): Help when a completed conversion result cannot be loaded. - [Validation service unavailable](https://www.invoice-converter.com/en/resources/platform-incidents/validation-service-unavailable): Help for temporary KoSIT or authoritative validation outages. - [Browser error or page flicker](https://www.invoice-converter.com/en/resources/platform-incidents/browser-error-or-page-flicker): Help for Sentry/client-side and hydration-style browser issues. - [Account, login, and rate-limit unavailable](https://www.invoice-converter.com/en/resources/platform-incidents/account-login-and-rate-limit-unavailable): Help for Supabase-backed auth, account, and shared rate-limit blocks. - [Credits and subscriptions](https://www.invoice-converter.com/en/resources/platform-incidents/credits-and-subscription-events): Help for delayed payment, credit, and subscription reconciliation. - [Missing required invoice information](https://www.invoice-converter.com/en/resources/review-validation/missing-required-invoice-information): Help for required seller, buyer, invoice, currency, and line fields. - [Buyer reference and Leitweg-ID](https://www.invoice-converter.com/en/resources/review-validation/buyer-reference-and-leitweg-id): Help for German public-sector routing references. - [Payment and IBAN problems](https://www.invoice-converter.com/en/resources/review-validation/payment-and-iban-problems): Help for payment instructions, IBAN, and bank transfer requirements. - [VAT and reverse charge problems](https://www.invoice-converter.com/en/resources/review-validation/vat-reverse-charge-and-tax-category-problems): Help for tax category, exemption, VAT ID, and reverse charge checks. - [Totals and rounding mismatches](https://www.invoice-converter.com/en/resources/review-validation/totals-rounding-and-line-amount-mismatches): Help for recalculated totals, tax subtotals, and rounding differences. - [Prepayments and paid amounts](https://www.invoice-converter.com/en/resources/review-validation/prepayments-and-previously-paid-amounts): Help for deposits, advance payments, and amount-due calculations. - [Line item and unit code problems](https://www.invoice-converter.com/en/resources/review-validation/line-item-and-unit-code-problems): Help for item names, quantities, unit codes, prices, and service periods. - [ZUGFeRD and Factur-X PDF warnings](https://www.invoice-converter.com/en/resources/review-validation/zugferd-facturx-pdf-warnings): Help for hybrid PDF/XML review, stale validation, and source PDF readiness. ## Country Guide Detail Pages - [Germany country guide](https://www.invoice-converter.com/en/resources/countries/de): German routing, identifiers, formats, and delivery expectations. - [France country guide](https://www.invoice-converter.com/en/resources/countries/fr): French routing, identifiers, formats, and delivery expectations. - [Italy country guide](https://www.invoice-converter.com/en/resources/countries/it): Italian routing, identifiers, formats, and delivery expectations. - [Spain country guide](https://www.invoice-converter.com/en/resources/countries/es): Spanish routing, identifiers, formats, and delivery expectations. - [Poland country guide](https://www.invoice-converter.com/en/resources/countries/pl): Polish routing, identifiers, formats, and delivery expectations. - [Netherlands country guide](https://www.invoice-converter.com/en/resources/countries/nl): Dutch routing, identifiers, formats, and delivery expectations. - [Belgium country guide](https://www.invoice-converter.com/en/resources/countries/be): Belgian routing, identifiers, formats, and delivery expectations. - [Austria country guide](https://www.invoice-converter.com/en/resources/countries/at): Austrian routing, identifiers, formats, and delivery expectations. - [Denmark country guide](https://www.invoice-converter.com/en/resources/countries/dk): Danish routing, identifiers, formats, and delivery expectations. - [Sweden country guide](https://www.invoice-converter.com/en/resources/countries/se): Swedish routing, identifiers, formats, and delivery expectations. - [Finland country guide](https://www.invoice-converter.com/en/resources/countries/fi): Finnish routing, identifiers, formats, and delivery expectations. ## Code List Detail Pages - [Currency codes](https://www.invoice-converter.com/en/resources/code-lists/currency-codes): Common ISO 4217 values used on invoices. - [Country codes](https://www.invoice-converter.com/en/resources/code-lists/country-codes): Common ISO 3166-1 alpha-2 values for invoice parties and addresses. - [VAT category codes](https://www.invoice-converter.com/en/resources/code-lists/vat-category-codes): Tax category code meanings used in structured invoices. - [Payment means codes](https://www.invoice-converter.com/en/resources/code-lists/payment-means-codes): Standard payment method codes for invoice exchange. - [Unit codes](https://www.invoice-converter.com/en/resources/code-lists/unit-codes): Common unit-of-measure codes for invoice lines. - [Invoice type codes](https://www.invoice-converter.com/en/resources/code-lists/invoice-type-codes): Common document type codes used in XRechnung and related workflows. ## ZUGFeRD Profile Detail Pages - [ZUGFeRD MINIMUM profile](https://www.invoice-converter.com/en/resources/zugferd/profiles/minimum): Lightest profile for PDF-first workflows. - [ZUGFeRD BASIC WL profile](https://www.invoice-converter.com/en/resources/zugferd/profiles/basic-wl): Header and totals profile without structured line items. - [ZUGFeRD BASIC profile](https://www.invoice-converter.com/en/resources/zugferd/profiles/basic): Practical profile with structured line-level invoice data. - [ZUGFeRD EN 16931 profile](https://www.invoice-converter.com/en/resources/zugferd/profiles/en16931): Compliance-oriented profile aligned to the European semantic model. - [ZUGFeRD EXTENDED profile](https://www.invoice-converter.com/en/resources/zugferd/profiles/extended): Richest profile for advanced structured invoice requirements. ## EU Pillar Detail Pages - [EU e-invoicing in 2026](https://www.invoice-converter.com/en/resources/eu/eu-e-invoicing-2026): Implementation priorities, timelines, and market direction. - [EU top markets playbook](https://www.invoice-converter.com/en/resources/eu/eu-top-markets-playbook): Practical rollout guidance across major EU markets. - [PEPPOL in the EU](https://www.invoice-converter.com/en/resources/eu/peppol-in-the-eu): How network-based exchange works in practice. - [CTC, clearance, and portal models](https://www.invoice-converter.com/en/resources/eu/ctc-clearance-and-portals): Integration patterns for regulated delivery channels. ## Glossary Term Pages - [EN 16931](https://www.invoice-converter.com/en/resources/glossary/en-16931): European semantic e-invoicing standard. - [CIUS](https://www.invoice-converter.com/en/resources/glossary/cius): Country or sector usage specification constraining EN 16931. - [XRechnung](https://www.invoice-converter.com/en/resources/glossary/xrechnung): German public-sector e-invoicing specification. - [ZUGFeRD](https://www.invoice-converter.com/en/resources/glossary/zugferd): Hybrid PDF/XML e-invoice format. - [Factur-X](https://www.invoice-converter.com/en/resources/glossary/factur-x): French hybrid e-invoice format aligned with ZUGFeRD. - [UBL](https://www.invoice-converter.com/en/resources/glossary/ubl): Universal Business Language invoice syntax. - [CII](https://www.invoice-converter.com/en/resources/glossary/cii): Cross Industry Invoice syntax from UN/CEFACT. - [PEPPOL](https://www.invoice-converter.com/en/resources/glossary/peppol): Network for interoperable business document exchange. - [PEPPOL BIS](https://www.invoice-converter.com/en/resources/glossary/peppol-bis): PEPPOL business interoperability specification. - [Access Point](https://www.invoice-converter.com/en/resources/glossary/access-point): PEPPOL-certified connection provider. - [Participant ID](https://www.invoice-converter.com/en/resources/glossary/participant-id): Network address used to route PEPPOL documents. - [SMP](https://www.invoice-converter.com/en/resources/glossary/smp): Service metadata publisher for endpoint discovery. - [SML](https://www.invoice-converter.com/en/resources/glossary/sml): Central locator infrastructure used by PEPPOL metadata discovery. - [Leitweg-ID](https://www.invoice-converter.com/en/resources/glossary/leitweg-id): German public-sector routing identifier. - [KoSIT](https://www.invoice-converter.com/en/resources/glossary/kosit): German validation and standardization authority context. - [Validation](https://www.invoice-converter.com/en/resources/glossary/validation): Schema and business-rule checking for invoice files. - [XML Schema (XSD)](https://www.invoice-converter.com/en/resources/glossary/schema): Structural schema definition used in XML validation. - [XML](https://www.invoice-converter.com/en/resources/glossary/xml): Structured markup used by invoice syntaxes. - [PDF/A-3](https://www.invoice-converter.com/en/resources/glossary/pdf-a-3): Archival PDF format used in hybrid invoices. - [Business Term (BT)](https://www.invoice-converter.com/en/resources/glossary/business-term-bt): Named semantic field in EN 16931. - [Business Group (BG)](https://www.invoice-converter.com/en/resources/glossary/business-group-bg): Logical grouping of business terms in EN 16931. - [VAT ID](https://www.invoice-converter.com/en/resources/glossary/vat-id): Tax identifier for invoice parties. - [Reverse charge](https://www.invoice-converter.com/en/resources/glossary/reverse-charge): VAT treatment where tax liability shifts to the buyer. - [Tax category](https://www.invoice-converter.com/en/resources/glossary/tax-category): Code or classification describing VAT treatment. - [Code list](https://www.invoice-converter.com/en/resources/glossary/code-list): Standardized set of allowed business values. - [Payment means](https://www.invoice-converter.com/en/resources/glossary/payment-means): Structured indicator for settlement method. - [IBAN](https://www.invoice-converter.com/en/resources/glossary/iban): International bank account number used in payment data. - [BIC](https://www.invoice-converter.com/en/resources/glossary/bic): Bank identifier code used in payment routing. - [Invoice type code](https://www.invoice-converter.com/en/resources/glossary/invoice-type-code): Structured code describing the document function. - [Credit note](https://www.invoice-converter.com/en/resources/glossary/credit-note): Document used to reduce or reverse invoice value. - [Document reference](https://www.invoice-converter.com/en/resources/glossary/document-reference): Structured link to a related business document. - [Purchase order (PO)](https://www.invoice-converter.com/en/resources/glossary/purchase-order): Buyer order reference used during invoice matching. - [Contract reference](https://www.invoice-converter.com/en/resources/glossary/contract): Identifier linking the invoice to a contract. - [Invoice line item](https://www.invoice-converter.com/en/resources/glossary/line-item): Structured description of an invoiced line. - [Unit code](https://www.invoice-converter.com/en/resources/glossary/unit-code): Standard code for quantity units. - [Allowance / charge](https://www.invoice-converter.com/en/resources/glossary/allowance-charge): Structured representation of discounts or surcharges. - [QR code payment](https://www.invoice-converter.com/en/resources/glossary/qr): Payment data encoded in a QR format. - [ViDA](https://www.invoice-converter.com/en/resources/glossary/vida): EU VAT in the Digital Age package. - [E-reporting](https://www.invoice-converter.com/en/resources/glossary/e-reporting): Near-real-time or structured reporting to authorities. - [Real-time reporting](https://www.invoice-converter.com/en/resources/glossary/real-time-reporting): Immediate or near-immediate tax-reporting model. ## Important Commercial And Workflow Pages - [Invoice Converter vs PDF24](https://www.invoice-converter.com/en/resources/comparisons/pdf24-xrechnung-zugferd-alternative): Comparison focused on validation depth, formats, and workflow fit. - [Invoice Converter vs sevDesk](https://www.invoice-converter.com/en/resources/comparisons/sevdesk-e-invoicing-conversion-alternative): Comparison focused on specialist conversion vs accounting-suite scope. - [Money-back guarantee](https://www.invoice-converter.com/en/money-back-guarantee): Commercial policy and refund positioning. ## Selected Guides - [EU e-invoicing 2025](https://www.invoice-converter.com/en/blog/eu-einvoicing-2025): Broad regulatory timeline and implementation overview. - [Germany e-invoice 2027 deadline](https://www.invoice-converter.com/en/blog/germany-e-invoice-2027-deadline): Source-of-truth guide for Germany's B2B mandate timeline, €800k threshold, and compliant format rules. - [Germany e-invoicing updates 2026](https://www.invoice-converter.com/en/blog/germany-einvoicing-news-2026): Net-new rollout updates, standards changes, and implementation news beyond the core mandate timeline. - [XRechnung required fields guide](https://www.invoice-converter.com/en/blog/xrechnung-required-fields-guide): Standards reference covering mandatory fields, recipient requirements, and core compliance rules. - [PDF to XRechnung conversion guide](https://www.invoice-converter.com/en/blog/pdf-to-xrechnung-conversion-guide): Practical workflow for PDF extraction, human review, XRechnung validation, and export. - [PDF to UBL XML workflow](https://www.invoice-converter.com/en/blog/pdf-to-ubl-xml-workflow): Practical workflow for PDF extraction, UBL XML validation, review, and sending. - [XRechnung vs ZUGFeRD vs PDF](https://www.invoice-converter.com/en/blog/xrechnung-vs-zugferd-vs-pdf): Decision guide for choosing the right format in Germany. - [PEPPOL network guide](https://www.invoice-converter.com/en/blog/peppol-network-guide): Practical PEPPOL background for send/receive workflows. - [KoSIT validator error codes](https://www.invoice-converter.com/en/blog/kosit-validator-error-codes): Troubleshooting-oriented validation guide. ## Markdown-Friendly Routes - [Trust Center markdown](https://www.invoice-converter.com/en/resources/trust-center/md): LLM-friendly markdown version of the Trust Center. - [Developer API markdown](https://www.invoice-converter.com/en/developer-api/md): LLM-friendly markdown version of the Developer API documentation. - [Email invoice integration markdown](https://www.invoice-converter.com/en/developer-api/email-invoices/md): LLM-friendly implementation guide for the account-enabled email invoice channel. - [Resources hub markdown](https://www.invoice-converter.com/en/resources/md): LLM-friendly markdown version of the resources index. - [Support playbooks markdown](https://www.invoice-converter.com/en/resources/support-playbooks/md): LLM-friendly markdown version of support playbooks. - [Validation playbooks markdown](https://www.invoice-converter.com/en/resources/validation-playbooks/md): LLM-friendly markdown version of validation playbooks. - [Test invoice fixtures markdown](https://www.invoice-converter.com/en/resources/test-invoices/md): LLM-friendly markdown version of the public fixture library. - [ERP export validation markdown](https://www.invoice-converter.com/en/resources/erp-export-validation/md): LLM-friendly markdown version of ERP export validation guides. - [Review validation help markdown](https://www.invoice-converter.com/en/resources/review-validation/md): LLM-friendly markdown version of review validation help. - [Platform incident help markdown](https://www.invoice-converter.com/en/resources/platform-incidents/md): LLM-friendly markdown version of platform incident help. - [Compliance hub markdown](https://www.invoice-converter.com/en/resources/compliance/md): LLM-friendly markdown version of the compliance hub. - [XRechnung standard markdown](https://www.invoice-converter.com/en/resources/compliance/xrechnung-standard/md): LLM-friendly markdown version of the XRechnung standard guide. - [ZUGFeRD format markdown](https://www.invoice-converter.com/en/resources/compliance/zugferd-format/md): LLM-friendly markdown version of the ZUGFeRD format guide. - [DIN EN 16931-1 markdown](https://www.invoice-converter.com/en/resources/compliance/din-en-16931-1-standard/md): LLM-friendly markdown version of the EN 16931 guide. - [XRechnung field reference markdown](https://www.invoice-converter.com/en/resources/xrechnung/md): LLM-friendly markdown version of the XRechnung field reference. - [KoSIT validator errors markdown](https://www.invoice-converter.com/en/resources/kosit-validator-errors/md): LLM-friendly markdown version of the KoSIT validator error hub. - [Code lists markdown](https://www.invoice-converter.com/en/resources/code-lists/md): LLM-friendly markdown version of the code-list hub. - [Glossary markdown](https://www.invoice-converter.com/en/resources/glossary/md): LLM-friendly markdown version of the glossary. - [Country guides markdown](https://www.invoice-converter.com/en/resources/countries/md): LLM-friendly markdown version of the country guides hub. - [EU hub markdown](https://www.invoice-converter.com/en/resources/eu/md): LLM-friendly markdown version of the EU hub. - [ZUGFeRD profiles markdown](https://www.invoice-converter.com/en/resources/zugferd/profiles/md): LLM-friendly markdown version of the ZUGFeRD profiles hub. - [Comparisons markdown](https://www.invoice-converter.com/en/resources/comparisons/md): LLM-friendly markdown version of the comparisons hub. - [XRechnung required fields markdown](https://www.invoice-converter.com/en/blog/xrechnung-required-fields-guide/md): LLM-friendly markdown version of the XRechnung required fields guide. - [PDF to XRechnung conversion guide markdown](https://www.invoice-converter.com/en/blog/pdf-to-xrechnung-conversion-guide/md): LLM-friendly markdown version of the PDF-to-XRechnung conversion guide. - [PDF to UBL XML workflow markdown](https://www.invoice-converter.com/en/blog/pdf-to-ubl-xml-workflow/md): LLM-friendly markdown version of the PDF-to-UBL workflow guide. - [XRechnung vs ZUGFeRD vs PDF markdown](https://www.invoice-converter.com/en/blog/xrechnung-vs-zugferd-vs-pdf/md): LLM-friendly markdown version of the format decision guide. - [Germany e-invoicing updates 2026 markdown](https://www.invoice-converter.com/en/blog/germany-einvoicing-news-2026/md): LLM-friendly markdown version of the Germany updates guide. - [KoSIT validator error codes markdown](https://www.invoice-converter.com/en/blog/kosit-validator-error-codes/md): LLM-friendly markdown version of the KoSIT troubleshooting guide. ## Optional - [Imprint](https://www.invoice-converter.com/en/imprint): Legal company information. - [Privacy policy](https://www.invoice-converter.com/en/privacy-policy): Data-processing and privacy policy. - [Terms and conditions](https://www.invoice-converter.com/en/terms-and-conditions): Service terms. - [Data processing agreement](https://www.invoice-converter.com/en/dpa): DPA overview for enterprise and procurement workflows.