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TutorialsWebMCP invoice conversion: review, validate, generate, and download with ChatGPT
Use ChatGPT with WebMCP to operate the Invoice Converter review, validation, generation, and download workflow in a supported browser.
4 min read
TutorialsConvert an invoice online: a simple web upload guide
Convert a PDF invoice online: choose a format, upload, review the extracted data, validate the result, and download the e-invoice.
3 min read
TutorialsBatch invoice conversion in the web app
Convert several invoices in one web batch: upload up to 10 files, review each result, validate, and download the completed e-invoices.
3 min read
TutorialsInvoice conversion API: a simple integration guide
Integrate invoice conversion by API: get access, upload with an idempotency key, poll the task, download the result, and handle validation.
4 min read
TutorialsConvert invoices by email: how the channel works
Convert invoice PDFs by email: enable the Enterprise channel, verify senders, choose a format, send attachments, and review the reply.
4 min read
ComplianceFrance E-Invoicing Mandate: September 2026 Go-Live Guide for Foreign Businesses
France goes live on 1 September 2026. Scope, Plateforme Agréée routing, e-reporting duties for foreign firms, and the penalty amounts raised in 2026.
12 min read
GuidesItaly SDI & FatturaPA E-Invoicing: Schema, Codice Destinatario & B2B Compliance
Practical guide to Italy’s SDI (Sistema di Interscambio): FatturaPA XML v1.2+, the 7-character Codice Destinatario, PEC routing, and cross-border reporting.
8 min read
GuidesPoland KSeF E-Invoicing Mandate: Rollout Timeline, FA(3) Schema & Integration
Guide to Poland’s Krajowy System e-Faktur (KSeF): 2026 rollout dates for large and SME taxpayers, FA(3) XML schema, QR codes, and offline mode.
7 min read
GuidesSpain VERI*FACTU & Ley Crea y Crece: E-Invoicing Rules, Timelines & Formats
Guide to Spain’s e-invoicing reforms: Ley Crea y Crece B2B mandate, Verifactu AEAT software requirements, XML formats, and payment reporting.
8 min read
GuidesPDF/A-3 Technical Guide: Embedding ZUGFeRD & Factur-X XML for Compliance
Technical deep-dive into PDF/A-3 (ISO 19005-3) attachment structures: XMP metadata schema, /AF array relationships, font subsetting, and veraPDF validation.
9 min read
TutorialsPDF to UBL XML: workflow, validation, and review before sending
Convert PDF invoices to UBL XML with validation, review steps, and practical checks before sending e-invoices.
7 min read
ComplianceEU e-invoicing in 2025: what still matters in 2026
A practical EU e-invoicing guide for April 2026: exact dates for Germany, France, Belgium, and ViDA, plus the rollout decisions teams still need to make.
7 min read
GuidesHow non-EU suppliers can create compliant invoices for EU customers
A practical guide for suppliers outside the EU: understand EN 16931, recipient-specific formats, routing, and the review steps needed before sending
8 min read
ComplianceWhich e-invoice formats are usable in Germany in 2026?
A practical Germany format guide for April 2026: when to use XRechnung, ZUGFeRD, UBL or CII, what still counts as a non-structured invoice, and how to
7 min read
GuidesZUGFeRD validators: what to test before you send a hybrid invoice
A practical 2026 guide to validating ZUGFeRD and Factur-X invoices: XML rules, PDF/A-3 checks, profile fit, common failures, and which validator types to
7 min read
GuidesConvert PDF to ZUGFeRD: when a hybrid invoice workflow fits
Learn when PDF to ZUGFeRD is the right bridge for B2B workflows, what a valid hybrid invoice must contain, and how to review the XML before sending.
8 min read
GuidesConvert PDF to XRechnung: practical workflow and paid plans
Learn when PDF to XRechnung conversion is the right bridge, which German deadlines matter in 2026, and how to validate the result before sending.
8 min read
GuidesERP integration checklist for e-invoicing rollout teams
A practical checklist for ERP e-invoicing projects, covering data mapping, format selection, validation, exception handling, and go-live controls.
9 min read
ComplianceGermany e-invoicing update 2026: what changed and what did not
A practical Germany e-invoicing update for April 2026: the BMF FAQ refresh, the dates that still hold, and the workflow decisions teams should make before 2027.
6 min read
ComplianceQ2 2026 e-invoicing compliance check: Germany, France, Belgium, ViDA
A practical Q2 2026 compliance check with exact dates for Germany, France, Belgium, and the EU ViDA package, plus the actions finance teams should take now.
7 min read
ComplianceEurope e-invoicing deadlines in 2026: Germany, France, Belgium, Poland and ViDA
Updated August 2026: compare e-invoicing deadlines in Germany, France, Belgium and Poland, and see what EU ViDA means for ERP compliance planning.
11 min read
GuidesEN 16931 Explained: The European E-Invoicing Standard (2026 Guide)
EN 16931 is the European standard for e-invoicing. Learn about compliance requirements, CIUS implementations (XRechnung, Factur-X, UBL), and how it affects
8 min read
ComplianceFrance E-Invoicing 2026: Factur-X Guide and Mandate Timeline
France's e-invoicing reform starts in September 2026. A practical guide to Factur-X, approved platforms, company-size deadlines, e-reporting, and
9 min read
GuidesPeppol Network Guide: What It Is and How to Get Connected
Complete guide to the Peppol network for e-invoicing. Learn what Peppol is, how the 4-corner model works, and how to connect your business for compliant B2B
10 min read
GuidesGermany E-Invoice Mandate 2027/2028: Timeline, €800k Threshold, and Format Rules
Germany B2B e-invoicing timeline: receive since 2025, issue from 2027 for issuers above €800,000 turnover, and a broad mandate by 2028. Includes the 2027
8 min read![KoSIT Validator Error Codes: BR-DE XRechnung Validation Errors [2026]](/_next/image?url=%2Fblog%2Fkosit-validator-error-codes.webp&w=3840&q=75&dpl=dpl_22hqhq85czyNQFecxdWNRZmH84f6)
GuidesKoSIT Validator Error Codes: BR-DE XRechnung Validation Errors [2026]
Guide to selected KoSIT validator BR-DE rules, UBL-CR-646, and other XRechnung/ZUGFeRD validation errors, with practical fixes.
18 min read
ComparisonsXRechnung vs ZUGFeRD vs PDF: Decision Guide for Germany in 2026
Decision matrix for XRechnung, ZUGFeRD, and PDF in Germany. Compare format structure, legal requirements, B2B/B2G compliance, and automated processing
11 min read
GuidesZUGFeRD BT Fields: Business Terms for Practical E-Invoicing
Understand ZUGFeRD BT fields, profile matrix (MINIMUM, BASIC, EN 16931, EXTENDED), field mappings, and compliance checks for EU e-invoicing.
10 min read
GuidesXRechnung Required Fields: Practical Reference Guide
Practical guide to the required fields in XRechnung. Learn what each field means and how to prepare invoices for German B2G compliance.
15 min read
GuidesLeitweg-ID Guide: Format, Examples & Routing Rules (2026)
Leitweg-ID for XRechnung B2G: format (5–46 characters), Grobstruktur/Feinstruktur, OZG-RE routing, and correct BT-10 placement.
7 min read
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