A practical guide to EN 16931, XRechnung, ZUGFeRD and Factur-X: what the semantic data model requires, which fields matter, and how to validate an invoice before you send it.
E-invoicing · 7 min read
How WebAssembly, Web Workers and browser storage let real document, image and video processing happen without uploads — and how to verify a tool is genuinely local.
Privacy · 6 min read
Work backwards from your target net income to a defensible hourly and daily rate, with realistic billable ratios, business costs, income tax and social contributions built in.
Freelancing · 7 min read
Reverse charge, OSS distance selling, exports outside the EU and the place-of-supply rules that decide which country's VAT applies — explained for freelancers and small sellers.
Tax · 6 min read
A technical comparison of pure XML (XRechnung) and hybrid PDF/A-3 (ZUGFeRD/Factur-X) under EN 16931: syntax, profiles, embedding mechanics, archiving and a decision workflow for B2G and B2B senders.
E-invoicing · 9 min read
What actually happens to a document you upload to a free online PDF tool: transport and storage exposure, GDPR processor duties, metadata leakage — and how WebAssembly lets the same conversion run entirely in your browser.
Privacy · 9 min read