Are private keys uploaded anywhere?

No. Key generation is 100% client-side in your browser. Keys never leave your device.

Is this suitable for production key management?

No. This tool is for learning and testing only. Production key generation requires HSMs or secure key management services.

1024-bit: <1 second. 2048-bit: 2-5 seconds. 4096-bit: 10-30 seconds depending on your device.

Yes, for self-signed local testing only. Production TLS requires Certificate Authority involvement and proper key handling.

The key is gone. Always backup private keys securely before discarding them. Generate again if lost.

PEM can be converted to DER (binary), JWKS (JSON), or other formats using openssl or dedicated key conversion tools.

Security Lab Tools

Generate RSA public and private keys locally for test workflows.

RSA Key Pair Generator creates temporary public and private RSA key pairs directly in the browser for local testing and prototyping.
Generate keys in PEM format for use in encryption, signing, and JWT workflows without server-side key generation.

Choose desired key size: 1024, 2048, or 4096 bits (2048+ recommended for real use).
Click generate to produce a new RSA key pair using browser crypto.
Review the public and private key outputs in PEM format.
Copy each key separately for use in local testing fixtures, encryption prototypes, or JWT validation.

Results should be validated in your target runtime before production use.
Extremely large input payloads may be constrained by browser memory and performance limits.

Logging private keys: Never log, email, or share private key material. Treat as highest-secret credentials.
Using 1024-bit keys: Factorization attacks are practical against 1024-bit RSA. Always use 2048+ bits.
Sharing keys across environments: Separate test, staging, and production keys. Never reuse production keys for development.
Exporting keys unsafely: Store keys in secure environments (vaults, encrypted files). Not in version control or plain text.
Incorrect PEM format: PEM headers must exactly match (-----BEGIN RSA PRIVATE KEY-----, not missing hyphens). Copy precisely.
Mixing key pairs: Ensure public/private pairs match. Using mismatched keys causes encryption/decryption failures.

RSA: Asymmetric cryptography using paired public/private keys. Public encrypts; private decrypts (or vice versa for signing).
Key size: 1024 bits (weak, deprecated). 2048 bits (minimum for 2024). 4096 bits (recommended for long-term security).
PEM format: Base64-encoded DER with headers (-----BEGIN RSA PRIVATE KEY-----). Standard for key transport.
Public key: Distributes freely; encrypts data or verifies signatures. Cannot decrypt or sign.
Private key: Closely guarded; decrypts data or signs messages. Compromise is catastrophic.
Modulus and exponent: N (product of primes) and e/d (public/private exponent). Security depends on N factorization hardness.
Key generation: Involves finding large primes and computing exponents. CPU-intensive; takes seconds for 4096-bit keys.

Specifications & Standards

Are private keys uploaded anywhere?
No. Key generation is 100% client-side in your browser. Keys never leave your device.
Is this suitable for production key management?
No. This tool is for learning and testing only. Production key generation requires HSMs or secure key management services.
How long does key generation take?
1024-bit: <1 second. 2048-bit: 2-5 seconds. 4096-bit: 10-30 seconds depending on your device.
Can I use generated keys for TLS certificates?
Yes, for self-signed local testing only. Production TLS requires Certificate Authority involvement and proper key handling.
What if I lose the private key?
The key is gone. Always backup private keys securely before discarding them. Generate again if lost.
Can I convert PEM keys to other formats?
PEM can be converted to DER (binary), JWKS (JSON), or other formats using openssl or dedicated key conversion tools.

Explore related utilities inside the Security Lab workshop for complementary engineering workflows.