XColdPro — Air-Gapped Cold Wallet Software

XColdPro is cold wallet software for Windows and macOS that runs fully air-gapped. It encrypts wallet material with AES-256-GCM, supports 22 blockchain networks plus custom ERC-20 and SPL tokens, and requires no proprietary hardware.

Cold storage without a dedicated device

Conventional hardware wallets perform key operations inside a purpose-built device. XColdPro instead turns a computer you already own into an isolated cold-storage environment, which removes the shipping and supply-chain exposure that comes with ordering a sealed device. ColdGuardian 2.5-inch SATA SSD units are available for anyone who prefers hardware supplied ready to run.

How signing stays offline

Transactions are constructed on an online device, carried to the air-gapped environment by QR code or USB, signed there, and carried back as signed data. Private keys never reach a networked machine.

Your seed stays portable

Wallets use standard BIP39 seeds. A seed created in XColdPro can be restored in any other compatible wallet without this software present, so cold storage here does not become a lock-in.

Editions

Frost is the essential air-gapped edition. HellBound adds advanced operational security protocols. Nyxor carries the full stack, including SeedVault Shamir recovery, BlackHole decoy protection, and Citadel M-of-N multisig approval. A Bitcoin-only BTC Edition with consensus-enforced P2WSH multisig is announced and not yet on sale.