🗝️RSA Key Pair Generator

Generate RSA public/private key pairs for encryption.

Generates RSA-2048 key pair using SubtleCrypto. These are SPKI/PKCS8 format keys, not PGP format — for educational use only.

About RSA Key Pair Generator

RSA Key Pair Generator creates public and private RSA key pairs at 2048-bit or 4096-bit strength entirely within your browser using the Web Crypto API. Use the generated keys for asymmetric encryption, digital signatures, SSH authentication, or learning how public-key cryptography works.

How to Use RSA Key Pair Generator

1
Choose key size
Select 2048-bit for standard use or 4096-bit for higher security applications.
2
Generate the key pair
Click 'Generate Keys' and wait a moment while the key pair is created using the Web Crypto API.
3
Copy and save your keys
Copy the public key and private key from their respective panels. Store the private key securely — never share it.

Common Use Cases

Generating RSA keys for use in SSH server authentication
Creating key pairs for asymmetric encryption in custom applications
Learning how RSA public/private key cryptography works
Producing test keys for development and staging environments

Frequently Asked Questions

What is the difference between 2048-bit and 4096-bit RSA keys?

4096-bit keys provide a higher security margin than 2048-bit keys but are slower to generate and use. 2048-bit is considered secure for most uses through 2030+; 4096-bit is recommended for long-lived keys or high-security applications.

In what format are the generated keys?

Keys are generated and exported in PEM format (the standard BEGIN RSA PRIVATE KEY / BEGIN PUBLIC KEY format), making them compatible with OpenSSL, SSH, TLS, and most cryptographic libraries.

Is it safe to generate RSA keys in the browser?

Yes — key generation uses the browser's Web Crypto API, which calls the operating system's cryptographically secure random number generator. The keys are generated locally and never transmitted anywhere.