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 USB 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.