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Free tools, documentation, and answers for freelancers — plus Germany compliance guides and glossary entries in German.

ToolsFree calculators and generators — VAT, hourly rate, e-invoices, and compliance checks. No account required.Browse tools →GuidesArticles on invoicing and compliance. Germany E-Rechnung guides are available now (in German).Browse guides →GlossaryShort definitions for invoicing terms. Germany entries on E-Rechnung, ZUGFeRD, and GoBD (in German).Browse glossary →Germany (DE)Ratgeber, Lexikon, and free tools for German E-Rechnung, ZUGFeRD, GoBD, and compliance — in German.Open DE hub →DocumentationGuides, API references, and tutorials for the platform.Read docs →FAQAnswers to common questions about effitrio.Read FAQ →