Cryptographic Key Generator

Generate cryptographic private keys or key pairs using the SubtleCrypto API. Select your desired algorithm, key usages, and hash algorithm.

Key Algorithm: RSASSA-PKCS1-v1_5 (RSA) RSA-PSS ECDSA HMAC

Hash Algorithm: SHA-256 SHA-384 SHA-512

Generate Key

About the Key Generator Tool

The Key Generator tool lets you create cryptographic keys and key pairs (RSA, ECDSA, HMAC) securely in your browser using the Web Crypto API. Choose your algorithm and hash, then generate keys for signing, verification, or encryption.

How to Use

1. Select the key type: RSA, ECDSA, or HMAC.
2. For RSA, choose the key size (2048 or 4096 bits). For ECDSA, choose the curve (P-256, P-384, P-521).
3. Click 'Generate' to create the key pair.
4. Copy the private key (PEM format) securely — it should never be shared.
5. Copy the public key (PEM format) to share with services that need to verify signatures.

This key generator uses the Web Crypto API built into your browser — keys are generated locally and never transmitted. Outputs RSA and EC keys in standard PEM format compatible with OpenSSL, Node.js, Python, and most cryptographic libraries. For production keys, use a hardware security module (HSM) or a key management service.

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