Generate secure SSH key pairs (Ed25519, RSA) for server authentication and Git. Creates public/private keys with fingerprints
Generate SSH key pairs in your browser, Ed25519 or RSA. Download the public and private keys and get setup instructions for common platforms like GitHub, GitLab, and standard SSH servers. Keys are generated locally with the Web Crypto API and the private key is never transmitted.
Initializing in your browser…
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You are onboarding to a new Git host and need a modern SSH keypair to paste a public key into your account settings.
Options
Type Ed25519 · Comment "you@laptop"
Keypair
Public key (add this to the Git host): ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIM… you@laptop Private key (save to ~/.ssh/id_ed25519, never share): -----BEGIN OPENSSH PRIVATE KEY----- …
Ed25519 is the recommended default: small keys, fast, and strong, preferable to RSA-2048 for new keys. Only the public half goes to the server; the private half is what proves your identity and must stay on your device. Generation runs entirely in the browser, so the secret key is never transmitted.
Generate SSH key pairs in your browser, Ed25519 or RSA. Download the public and private keys and get setup instructions for common platforms like GitHub, GitLab, and standard SSH servers. Keys are generated locally with the Web Crypto API and the private key is never transmitted.
SSH keys provide passwordless, cryptographically strong authentication. This generator supports two key types: Ed25519 (modern, fast, small keys, recommended for new setups) and RSA at 2048 or 4096 bits (widely compatible, use 4096 for maximum strength). Both are generated client-side with crypto.subtle.generateKey, formatted into OpenSSH public-key format, and given a SHA-256 fingerprint. The private key is generated locally and never leaves your device.
Generate a key pair and add the public key to your Git hosting account for passwordless push and pull.
Create keys for SSH access to remote servers without relying on password authentication.
Generate dedicated key pairs for automated deployment pipelines that need SSH access to repositories or servers.
Quickly generate a new key pair when an existing key needs to be rotated or has been compromised.
Ed25519 for most use cases, it's fast, secure, and produces small keys. Use RSA 4096 if you need compatibility with very old systems. ECDSA is not offered here.
Yes, when using the Web Crypto API. The private key is generated locally and never leaves your device.
This tool outputs an unencrypted private key. To protect a personal key with a passphrase, run ssh-keygen -p -f <keyfile> after downloading. CI/CD keys are usually left passphrase-free.
This runs as client-side JavaScript. Keys, tokens, payloads, and other inputs never leave your device.