SSH Key Generator

Generate secure SSH keys (RSA or Ed25519) with custom key sizes and optional passphrase protection directly in your browser.

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Total Calculations Run

< 15ms

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Client-Side Privacy

4.9 / 5.0

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About This Tool

This tool allows you to generate secure SSH keys (RSA or Ed25519) entirely in your browser using the Web Crypto API. Choose between RSA (2048-4096 bits) or Ed25519 key types, set an optional passphrase for added security, and generate both public and private keys instantly. The keys are generated locally and never leave your browser, ensuring maximum privacy and security. Download your keys or copy them to clipboard with one click.

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How to Use

Select key type (RSA or Ed
Choose key size (for RSA: 2048, 3072, or 4096 bits)
Enter an optional passphrase for added security
Click 'Generate SSH Key' button
View your generated public and private keys
Copy keys to clipboard or download them as files

Frequently Asked Questions

Find Quick Answers

Is my SSH key generated securely?

Yes, all key generation happens locally in your browser using the Web Crypto API. No data is sent to any server, ensuring complete privacy.

What's the difference between RSA and Ed25519?

RSA is a widely compatible algorithm with larger key sizes (2048-4096 bits). Ed25519 is a modern algorithm with smaller keys (256 bits) that offers better performance and security.

Can I use a passphrase with my SSH key?

Yes, you can optionally add a passphrase to encrypt your private key. This adds an extra layer of security but requires entering the passphrase when using the key.

How do I use the generated SSH keys?

Copy the public key to your server's authorized_keys file and keep the private key secure on your local machine. Use the private key with SSH clients to authenticate.

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