What is RSA Key Pair Generator Online?
RSA (Rivest–Shamir–Adleman) remains the most widely used asymmetric encryption algorithm in the world. Our RSA key pair generator online tool allows you to create secure public and private key pairs for a wide variety of development tasks, including securing TLS connections, signing JWT tokens, and setting up SSH access. A key pair consists of a public key, which you can share freely, and a private key, which must be kept secret. Security is our top priority. All key generation is performed using the native `window.crypto.subtle` API (Web Cryptography API), meaning the keys are generated locally on your machine and never transmitted over the network. This provides a safe, private environment for creating production-ready keys without the risk of interception. The tool outputs keys in the standard PEM (Privacy Enhanced Mail) format, which is compatible with OpenSSL, SSH, and most modern programming languages. Whether you are a student learning about cryptography or a developer setting up a secure server, this generator provides the industry-standard keys you need.
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.
Developer Tips
Never commit your private keys to version control (like Git). Use environment variables or a dedicated secrets manager (like AWS Secret Manager or GitHub Secrets) to store private keys safely in your production environment.
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.