SSH Key Generator
Generate SSH key pairs (RSA/ED25519)
SSH Key Generator
Generate SSH key pairs for secure authentication
Added to the end of the public key for identification
SSH Key Best Practices
- Use Ed25519 for modern systems (smaller, faster, more secure)
- Use RSA 4096-bit for compatibility with older systems
- Protect private keys with passphrases
- Store private keys with 600 permissions (chmod 600)
- Never commit private keys to version control
- Rotate keys periodically
Privacy & Security
All SSH key generation happens entirely in your browser using cryptographically secure random number generation. Your private keys are never uploaded to our servers, transmitted over the network, stored in databases, or logged anywhere. Keys exist only in your browser memory and are permanently erased when you close the page. For maximum security, we recommend downloading keys immediately and storing your private key in a secure location with appropriate file permissions (chmod 600).
About SSH Key Generator
Generate secure SSH key pairs instantly with our free online SSH key generator. Whether you're a DevOps engineer setting up server access, a developer configuring Git authentication, a system administrator managing multiple servers, or a security professional implementing public key infrastructure, our tool creates cryptographically secure RSA, Ed25519, and ECDSA key pairs in seconds. Perfect for GitHub, GitLab, cloud servers, and secure remote access without storing keys on external servers.
Key Features
Multiple Algorithms
Generate RSA, Ed25519, and ECDSA keys with industry-standard security
Customizable Key Size
Choose from 2048, 3072, or 4096-bit RSA keys for desired security level
Instant Generation
Create public and private key pairs in seconds directly in your browser
OpenSSH Format
Keys generated in standard OpenSSH format compatible with all SSH servers
Passphrase Protection
Optionally encrypt private keys with strong passphrases for added security
PEM & OpenSSH Formats
Export keys in multiple formats for compatibility with different systems
Key Fingerprint Display
View SHA256 and MD5 fingerprints to verify key identity
Copy & Download
Easily copy keys to clipboard or download as files for immediate use
Comment Customization
Add custom comments to identify keys for different servers or purposes
Client-Side Generation
All keys generated in browser - never transmitted or stored on servers
How to Use the SSH Key Generator
Choose Algorithm & Key Size
Select Ed25519 for modern security or RSA with desired bit length (2048, 3072, 4096)
Add Optional Passphrase
Enter a passphrase to encrypt the private key for additional protection (optional but recommended)
Generate Key Pair
Click 'Generate Keys' to create your public and private SSH key pair instantly
Copy or Download Keys
Copy keys to clipboard or download files, then add public key to servers and keep private key secure
Frequently Asked Questions
What is SSH key authentication and why use it?
SSH key authentication uses cryptographic key pairs (public and private keys) instead of passwords for secure server access. It's more secure than passwords because keys are virtually impossible to brute-force, can't be guessed, and allow for password-free automation. The private key stays on your computer while the public key is added to servers you want to access.
Should I use RSA or Ed25519 keys?
For modern systems, Ed25519 is recommended. It offers stronger security with smaller key sizes, faster operations, and better resistance to side-channel attacks. However, RSA is still widely compatible and secure - use 3072 or 4096-bit RSA if you need compatibility with older systems that don't support Ed25519.
What key size should I choose for RSA?
For RSA keys, 2048-bit is the minimum acceptable standard, 3072-bit offers strong security for most use cases, and 4096-bit provides maximum security (though with slightly slower operations). For general server access and Git, 3072-bit or 4096-bit is recommended.
Should I add a passphrase to my private key?
Yes, adding a passphrase is highly recommended. If someone gains access to your private key file, the passphrase provides an additional layer of protection. Without a passphrase, anyone with the file can immediately access your servers. The passphrase encrypts the private key so it's unusable without the correct passphrase.
How do I use the generated SSH keys?
After generation: 1) Save the private key to ~/.ssh/id_rsa (RSA) or ~/.ssh/id_ed25519 (Ed25519) with permissions 600, 2) Copy the public key to the server's ~/.ssh/authorized_keys file, or 3) Add the public key to GitHub/GitLab in account SSH settings. Then you can SSH to servers or use Git without password prompts.
Are the generated keys secure?
Yes! Keys are generated using cryptographically secure random number generation in your browser. All generation happens client-side with no transmission to servers. The keys are cryptographically equivalent to those generated by OpenSSH command-line tools.
Is this SSH key generator free?
Yes! Our SSH key generator is completely free to use with unlimited key generation and no registration required.
Will my private keys be stored or transmitted?
No. All key generation happens entirely in your browser using JavaScript. Your keys are never uploaded to our servers, stored in databases, transmitted over networks, or logged anywhere. When you close the page, the keys are permanently gone from our site. Completely private and secure.
Common Use Cases
- GitHub/GitLab Authentication: Generate SSH keys for password-free Git operations and secure repository access
- Server Access Management: Create keys for secure SSH login to Linux servers, VPS, and cloud instances
- Automated Deployments: Set up SSH keys for CI/CD pipelines and automated deployment scripts
- SFTP File Transfers: Generate keys for secure file transfer protocol connections without passwords
- Multi-Server Administration: Create unique key pairs for managing multiple servers and maintaining access logs
- Container & Kubernetes Access: Configure SSH keys for accessing containers, pods, and Kubernetes clusters
- Jump Server Configuration: Set up bastion hosts with SSH keys for secure network access
- Database Remote Access: Establish secure tunnels to databases using SSH key authentication
Why Use Our SSH Key Generator?
Setting up SSH keys shouldn't require installing software, learning command-line syntax, or trusting third parties with your private keys. Our free SSH key generator creates cryptographically secure key pairs instantly in your browser, giving you the same security as command-line tools without the complexity. Whether you're new to SSH and need a simple way to generate keys for GitHub, or an experienced sysadmin who wants quick key generation without touching the terminal, you'll appreciate the instant results, multiple algorithm support, and complete privacy. No more googling ssh-keygen commands or worrying about key file permissions - just generate, download, and deploy your keys securely.