The SteelQR is an open-source hardware backup solution that converts a BIP-39 compliant 12-word (C12) or 24-word (C24) seed phrase into a compact QR code format etched or punched onto a 3mm thick 316L military-grade stainless steel plate. This provides a highly durable, offline cold storage backup method resistant to water, corrosion, and extreme heat—capable of withstanding temperatures up to ~1,400–1,500°C before significant degradation.
The QR code is readable only by compatible devices such as SeedSigner, Foundation Devices Passport, Coldcard, or other BIP-39/QR-supporting wallets, preventing unauthorized scanning on non-compatible readers. For C24 versions, the QR can be permanently marked using a center punch (sold separately) for fully air-gapped, offline permanence.
Variants
- C12: For 12-word seed phrases
- C24: For 24-word seed phrases (supports optional permanent center punch marking)
What’s Included
- SteelQR plate (C12 or C24)
- Instructions for QR encoding and marking
This SteelQR can be purchased together with the NovaSapien Self-Custody Kit – Sovereign Backup System for a complete, best-practices self-custody solution that pairs the steel plate with comprehensive backup materials.
NovaSapien’s online self-custody courses offer detailed, step-by-step guidance on seed management and offline backups. If you’re unfamiliar with SeedQR or QR-based backups, the courses provide clear, approachable instructions—take your time to build a thorough understanding. You can also reach out to NovaSapien directly for assistance. Official resources are available at seedsigner.com.
Technical Specifications
- Material: 316L military-grade stainless steel
- Thickness: 3mm
- Fire resistance: Withstands ~1,400–1,500°C before significant degradation
- Weight: ~0.2 kg per plate
- Dimensions: ~85 × 55 × 3 mm (approximate)
- Warranty: 360 days on components
Returns
Unused and undamaged plates can be returned within 30 days. No returns on opened or used products.
Optional Extras & Bundles
- Center Punch: $20 (for permanent marking on C24)
- Bundle: 3x SteelQR plates + Center Punch: $120
Frequently Asked Questions
What is SteelQR?
SteelQR is a 3mm 316L stainless steel plate that encodes 12-word (C12) or 24-word (C24) BIP-39 seed phrases as compact QR codes for secure, long-term offline cold storage backups.
How durable is it?
Made from 316L military-grade stainless steel, it is waterproof, corrosion-resistant, and fireproof up to ~1,400–1,500°C before significant degradation—designed to protect seeds for decades in extreme conditions.
How do I use it?
Convert your seed phrase to QR code (using SeedSigner or compatible software), then engrave or mark the QR onto the plate. For C24, optionally use a center punch for permanent, air-gapped storage.
Is it compatible with SeedSigner, Foundation Devices, Coldcard?
Yes—fully compatible with SeedSigner, Foundation Devices Passport, Coldcard, and any BIP-39/QR-supporting wallet. The QR format is readable by these devices for quick restoration.
What if I lose the plate?
If the plate is lost without redundant backups, your seed is unrecoverable. Always create multiple copies in geographically separate locations using best practices from NovaSapien courses.
Can I engrave it myself?
Yes, using a center punch (sold separately) for C24 or manual engraving tools. NovaSapien courses provide guidance on safe, accurate marking.
Where can I find more information?
NovaSapien’s online self-custody courses offer detailed support on seed backups and offline storage—if you’re unfamiliar with SeedQR or QR-based backups, the courses provide clear guidance. You can also reach out to NovaSapien directly for assistance. Additional resources at seedsigner.com.
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