About Us
What is German Writing Coach?
German Writing Coach is a free, AI-powered tool that helps German language learners transform rough drafts into polished, natural German prose. It supports all CEFR proficiency levels — from A1 beginners to C2 advanced — and is especially useful for learners preparing for Goethe-Institut or TestDaF exams who need practical feedback on real-world writing tasks.
Unlike simple German grammar checkers, German Writing Coach provides:
- Two-pass corrections — See both minimal grammar fixes and a fully upgraded version of your German text
- Targeted feedback — Learn from your specific mistakes with memorable rules
- Phrase bank — Build your German vocabulary with reusable expressions extracted from your sessions
- Context awareness — Get register-appropriate suggestions for professional, bureaucratic, or casual German writing
Who is this for?
- Exam candidates — Preparing for Goethe-Institut exams (A1, A2, B1, B2, C1, C2) or TestDaF? Practice your written German and get instant feedback at your target level.
- Professionals — Writing cover letters, business emails, or reports in German? Get polished, register-appropriate text.
- Expats in Germany — Communicating with Behörden, landlords, or insurance companies? Get help crafting clear, formal German.
- Self-learners — Anyone looking to improve their German writing skills with AI-powered guidance and a personal phrase bank.
Technology
Built with:
- Frontend: Blazor WebAssembly
- Backend: Azure Functions (C#)
- Database: Azure Cosmos DB
- AI: OpenAI GPT-4.1-mini with structured JSON outputs
- Hosting: Azure Static Web Apps
The project is open source on GitHub.
Privacy & Data
Your text is sent to OpenAI's API for analysis. When you're signed in, your coaching sessions and phrase bank are stored in Azure Cosmos DB. Anonymous usage is not persisted.
We collect only data essential to the service — your coaching sessions and extracted phrases. We do not use tracking cookies or third-party analytics beyond Application Insights for operational monitoring.
Your Data
You have the right to delete all data associated with your account at any time. This includes your coaching session history and all phrases in your phrase bank. This action is permanent and cannot be undone.
Sign in to manage your data.
Contact
Direct all general inquiries to contact@germanwritingcoach.com.