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melt is a lightweight, open-source utility developed by charmbracelet that converts Ed25519 SSH keys into a human-readable list of seed words, enabling users to back up or restore their cryptographic identities without storing bulky key files. By encoding the 256-bit private key into a standardized 24-word mnemonic, the program allows administrators, developers, and DevOps teams to print, write down, or store the phrase in any password manager, hardware token, or offline vault; conversely, the same words can later be fed back into melt to re-create the original Ed25519 key pair on any workstation or server. Typical use cases include disaster-recovery planning for production servers, secure migration of personal GitHub, GitLab, or cloud-vendor credentials, and simplified onboarding of contractors who need reproducible SSH access without transmitting files over email or chat. Because the mnemonic is deterministic, rotating a key simply requires generating a new Ed25519 identity and re-running melt, after which the updated phrase can be distributed through existing secret-sharing workflows. The tool runs from any terminal, requires no elevated privileges, and produces output that is fully compatible with OpenSSH’s default Ed25519 format, so restored keys work immediately with ssh, ssh-agent, and authorized_keys files. melt belongs to the Security & Encryption category, is currently offered in version 0.6.2, and has seen three public releases since its debut, each refining error handling and BIP39 word-list compliance. The software is available for free on get.nero.com, with downloads provided via trusted Windows package sources (e.g. winget), always delivering the latest version, and supporting batch installation of multiple applications.
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