RSA Key Generator

Generate RSA keys with custom lengths using the RSA Key Generator tool. Easily obtain private and public keys for encryption and decryption purposes.




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About RSA Key Generator

The RSA Key Generator is a web tool in our generators family designed to generate RSA key pairs with custom key lengths. The purpose of this tool is to provide users with a simple and convenient way to obtain RSA keys for encryption, decryption, signing, and verifying purposes. Whether you are building a secure communication system, implementing digital signatures, or encrypting sensitive data, the Generator can be immensely useful.


Here are some key features of the Generator:

  • Custom Key Lengths: The tool allows users to choose from key lengths of 1024, 2048, or 4096 bits, providing flexibility based on security and performance requirements.
  • Secure Key Generation: The RSA Key Generator utilizes the PKI library, which provides comprehensive support for X.509 certificate, ED25519 key generation, and RSA key encoding, decoding, encryption, decryption, signing, and verifying.
  • Private and Public Keys: Upon generating the keys, the tool provides both the private and public key components, enabling users to seamlessly integrate the keys into their applications for cryptographic operations.

How to Use the Generator

To effectively use the RSA Key Generator, follow these steps:

  1. Select Key Length: Choose the desired key length (1024, 2048, or 4096) based on your specific security needs and performance considerations.
  2. Click “Generate”: After selecting the key length, click the “Generate” button to initiate the key generation process.
  3. Obtain Keys: Once the keys are generated, the private and public key components will be displayed. You can then copy and use these keys in your applications for encryption, decryption, signing, and verifying operations.

Best Practices

  • Always use longer key lengths for enhanced security, especially when dealing with sensitive or critical data.
  • Safeguard the private key and ensure that it is not exposed to unauthorized entities.

Example Usage

  • Secure Communication: A developer working on a secure messaging platform utilizes the RSA Key Generator to obtain RSA keys for encrypting and decrypting messages between users.
  • Digital Signatures: An application requires digital signatures for document authenticity and integrity. The RSA Key Generator is used to generate keys for signing and verifying documents.


  1. What is the significance of the key length in RSA key generation?

    A longer key length enhances the security of RSA keys, making it more resistant to brute-force attacks.

  2. How are the RSA keys used for encryption and decryption?

    The public key is used for encryption, while the private key is used for decryption.

  3. What is the technology used in the RSA Key Generator tool?

    The tool utilizes the PKI library, which provides comprehensive support for RSA key generation and cryptographic operations. More information about PKI is available here.