SSH Key Generator — Free, No Upload, Browser-Based

Generate Ed25519 or RSA-4096 SSH key pairs instantly in your browser using the Web Crypto API. Both the public key (in OpenSSH authorized_keys format) and private key are produced locally — no file is ever transmitted to a server. Add an optional comment such as user@hostname, then download or copy each key with a single click.

このツールの使い方

1. Choose Ed25519 (recommended for modern setups) or RSA-4096 (for maximum compatibility), then optionally enter a comment like user@hostname.
2. Click "Generate Key Pair" — both keys are created in your browser using WebCrypto within seconds.
3. Copy or download the public key to paste into ~/.ssh/authorized_keys on your server, and save the private key locally with chmod 600.