SeedSigner is an open-source, air-gapped Bitcoin signing device that helps you manage seed phrases and sign transactions securely. Built using affordable, off-the-shelf hardware components (Raspberry Pi Zero, camera module, and LCD display), SeedSigner provides a stateless solution for Bitcoin key management without storing private keys on the device.
- 🔒 Air-gapped Security: Complete network isolation for maximum security
- 📱 QR Code Communication: Interact with wallets via QR codes only
- 🎲 Multiple Entropy Sources: Generate seeds using camera, dice, or calculation methods
- 🔧 Open Source: Fully auditable code and hardware design
- 💰 Cost-effective: Build your own device for under $50
- 🛡️ Stateless Design: No private key storage on device
Choose your preferred language to access the complete SeedSigner user guide:
📖 English User Guide Complete documentation in English
📖 Guía del Usuario en Español Documentación completa en español
📖 Guide d'Utilisation en Français Documentation complète en français
📖 Benutzerhandbuch auf Deutsch Vollständige Dokumentation auf Deutsch
📖 Guida Utente in Italiano Documentazione completa in italiano
📖 Gebruikershandleiding in het Nederlands Volledige documentatie in het Nederlands
📖 Guia d'Usuari en Català Documentació completa en català
📖 日本語ユーザーガイド 日本語での完全なドキュメント
📖 简体中文用户指南 简体中文完整文档
We welcome contributions to improve and expand this user guide!
- Translations: Help us add new languages or improve existing translations
- Content: Suggest improvements to existing documentation
- Screenshots: Provide updated screenshots for your language
- Bug Reports: Report any errors or unclear instructions
- Fork this repository
- Create a new directory under
guides/using the appropriate language code - Translate the content while maintaining the same structure
- Update this main README.md to include your language
- Submit a pull request
We use ISO 639-1 language codes for directory naming:
en- Englishes- Spanishfr- Frenchde- Germanit- Italynl- Nederlandsca- Catalanja- Japanesezh- Chinese
- SeedSigner Website: seedsigner.com
- Official GitHub: github.com/SeedSigner/seedsigner
- Hardware Guide: seedsigner.com/hardware
- Community Support: Visit the SeedSigner community forums and chat groups
SeedSigner is designed for users who understand Bitcoin security principles. Always:
- ✅ Verify your seed phrase backups
- ✅ Practice with small amounts first
- ✅ Maintain air-gap security
- ✅ Use in private environments
- ✅ Double-check all transaction details
Remember: Bitcoin transactions are irreversible. Take time to understand each step before proceeding with real funds.
This user guide is released under the MIT License. The SeedSigner software and hardware designs are open source - see the official repository for licensing details.
This community-maintained guide is updated regularly. For the latest official information, always refer to the SeedSigner project's official resources.