SSH Key Generator Online
Generate secure SSH key pairs for server authentication, Git repositories, and automated deployments. Choose between modern Ed25519 and traditional RSA algorithms.
- 256-bit security level
- Fast signature generation
- Compact key size
- Resistant to timing attacks
SSH Setup Guide
Client Setup (Your Computer)
# Save private key
nano ~/.ssh/id_ed25519
# Set secure permissions
chmod 600 ~/.ssh/id_ed25519
# Connect to server
ssh -i ~/.ssh/id_ed25519 user@serverServer Setup (Target Server)
# Add public key
echo "your-public-key" >> ~/.ssh/authorized_keys
# Set permissions
chmod 600 ~/.ssh/authorized_keys
chmod 700 ~/.sshEd25519 vs RSA Comparison
| Feature | Ed25519 | RSA |
|---|---|---|
| Key Size | 256 bits (32 bytes) | 2048-4096 bits (256-512 bytes) |
| Security Level | ~128-bit symmetric equivalent | 112-152 bit (depending on size) |
| Performance | Very fast generation & verification | Slower, especially with larger keys |
| Compatibility | Modern systems (OpenSSH 6.5+) | Universal compatibility |
| Recommendation | ✅ Preferred for new deployments | ⚠️ Use when Ed25519 not supported |
Common Use Cases
Secure password-less login to remote servers and cloud instances.
Access GitHub, GitLab, and other Git hosting services securely.
CI/CD pipelines and automated scripts for server management.
Security Best Practices
Never share private keys. Use proper file permissions (600).
Regularly rotate keys for high-security environments.
Add passphrases for additional security on sensitive systems.
Privacy & Security
This SSH key generator runs entirely in your browser using the Web Crypto API. No keys or data are transmitted to external servers. For production use with Ed25519, consider using OpenSSH's ssh-keygen command for full compatibility.