Is it safe to generate RSA keys in a browser?

Yes, for most use cases. This tool uses the `window.crypto.subtle` API, which is a standard, cryptographically secure function built into all modern browsers. The key generation happens entirely on your computer; the keys are never sent to our server or over the network, ensuring they remain private to you.

What is the difference between a public and a private key?

They are a mathematically linked pair. The **Public Key** can be shared freely with anyone. It is used to encrypt data that only the private key can decrypt, or to verify a signature made by the private key. The **Private Key** must be kept secret at all times. It is used to decrypt data encrypted with the public key, or to create a digital signature.

Which key size should I choose?

For most modern applications, **2048 bits** is considered the minimum standard for security. **4096 bits** provides an even higher level of security and is recommended for applications requiring very long-term protection, though it can be slightly slower in operations.

CodingMantra

RSA Key Pair Generator

A secure, browser-based tool to generate public and private RSA keys for encryption and digital signatures.

RSA Key Generator

Select your key size and generate a new pair.

Key Size (bits)

Public Key

Private Key

What is RSA?

RSA (Rivest–Shamir–Adleman) is a public-key cryptosystem that is widely used for secure data transmission. It relies on a pair of keys: a public key, which can be shared with anyone, and a private key, which must be kept secret. Data encrypted with the public key can only be decrypted with the corresponding private key. This principle is the foundation for much of the security on the internet, including protocols like TLS/SSL (which secures HTTPS) and for creating secure SSH connections.

Common Use Cases

SSH Authentication: Generate a key pair to log into servers securely without using a password.
JWT & Data Signing: Use the private key to sign JSON Web Tokens (JWTs) or other data, and use the public key to verify the signature's authenticity.
Secure Communication: Encrypt messages with a recipient's public key, ensuring that only they can read it with their private key.

Frequently Asked Questions (FAQs)

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