What is RSA Key Pair Generator Online?
RSA (Rivest–Shamir–Adleman) is the most widely used asymmetric encryption algorithm. A key pair consists of a public key (shared freely) and a private key (kept secret). Data encrypted with the public key can only be decrypted with the matching private key. Keys are output in PEM format — the standard used by OpenSSL, TLS, JWT libraries, and SSH.
How to Use RSA Key Pair Generator Online
- Select key size: 1024 (legacy), 2048 (standard), or 4096 (high security).
- Click Generate — key pair appears in PEM format.
- Copy public key to share; store private key securely.
Frequently Asked Questions
Which RSA key size should I use?
2048-bit is the current standard. Use 4096-bit for long-term security. 1024-bit is deprecated and insecure.
Is it safe to generate RSA keys in the browser?
Yes. Uses window.crypto.subtle.generateKey. Keys are never transmitted anywhere.