Special Pages

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About Coldcard

Coldcard devices are Bitcoin-only hardware wallets made by Coinkite Inc. in Toronto, Canada. They are built on three core security principles: Bitcoin-only, air-gapped signing, and open-source verifiable firmware.

COLDCARD FAQ

Frequently asked questions about COLDCARD — seed words, PINs, firmware upgrades, backups, secure elements, PSBT, and more.