RSA Keypair Generator & Encryption
Generate cryptographically secure 2048-bit & 4096-bit RSA asymmetric keypairs with live encryption testing in browser memory.
An RSA keypair generator creates a mathematically linked public key (for encryption and signature verification) and private key (for decryption and signing) based on the computational difficulty of factoring large prime numbers.
Where n = p × q is the modulus, e = 65537 is the public exponent, and d is the modular multiplicative inverse of e modulo φ(n).
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Systems & Security Engineers • Applied Cryptography & High-Performance Web Tools
How to Use RSA Keypair Generator & Encryption
Choose Modulus & Hash Strength
Select 2048-bit (standard) or 4096-bit (high security) along with SHA-256 or SHA-512 hashing.
Generate Keypair
Click Generate to create cryptographically secure asymmetric keys entirely in browser RAM.
Export PEM or Test Live
Copy or download .pem files, or type a secret message to test public-key encryption and private-key decryption.
Practical Examples & Conversions
Modulus: 2048, Hash: SHA-256, Algorithm: RSA-OAEP
SPKI Public Key (~450 chars) + PKCS#8 Private Key (~1700 chars)
Frequently Asked Questions (PAA)
Related Tools & Converters
Authoritative Standards & Citations
Calculations and algorithms on this page are implemented and verified in strict accordance with the following official technical specifications:
RFC 7519: JSON Web Token (JWT)
Standardized compact, URL-safe means of representing claims to be transferred between two parties.
Web Cryptography API Specification
Standard JavaScript API for performing basic cryptographic operations in web applications.
RFC 4122: A Universally Unique IDentifier (UUID) URN Namespace
Definition of uniform format and generation algorithms for UUIDs.