RSA & ECC Key Pair Generator Studio
Public-key cryptography (asymmetric encryption) forms the backbone of secure digital communication, SSH server authentication, TLS/SSL certificates, JWT signature verification, and secure API gateways.
The DwellixTools RSA & ECC Key Pair Generator Studio enables system administrators, DevOps engineers, and security developers to generate cryptographically strong public and private key pairs directly inside their browser using the native Web Crypto API (window.crypto.subtle).
Key Features & Supported Cryptographic Standards
- RSA Key Generation (2048, 3072, 4096-Bit): Generate industry-standard RSA public and private key pairs with configurable key modulus sizes (2048-bit, 3072-bit, and 4096-bit) using PKCS#8 (private) and SPKI (public) PEM encoding formats.
- ECC / ECDSA Curve Support: Generate lightweight, high-security Elliptic Curve Cryptography key pairs across standard NIST curves:
- P-256 (secp256r1): Standard 256-bit elliptic curve balancing performance and high security.
- P-384 (secp384r1): 384-bit curve engineered for top-tier enterprise compliance.
- P-521 (secp521r1): Maximum-strength 521-bit curve.
- Multiple Export Formats:
- PEM Format: Standard Base64
-----BEGIN PUBLIC KEY-----and-----BEGIN PRIVATE KEY-----formats for Nginx, Apache, and OpenSSL. - OpenSSH Format: Clean OpenSSH formatted public key strings (
ssh-rsa,ecdsa-sha2-nistp256) ready for.ssh/authorized_keys. - JWK (JSON Web Key): Structured JSON representation of cryptographic keys for OAuth2, OpenID Connect, and JWT signing verification.
- PEM Format: Standard Base64
- 100% In-Browser Hardware Randomness: Keys are generated using your OS-level cryptographically secure random number generator (
window.crypto.getRandomValues()). Zero private keys ever touch external networks or server storage.
Technical Key Algorithm Comparison
| Algorithm | Bit Length / Curve | Security Level | Best Used For |
|---|---|---|---|
| RSA-2048 | 2048 bits | Standard Security | Web SSL certificates, legacy SSH servers, legacy API signing |
| RSA-4096 | 4096 bits | High Security | Long-term root CA certificates, GPG signing keys |
| ECDSA P-256 | 256 bits | High Security (Equivalent to RSA-3072) | Modern SSH access, JWT tokens, mobile APIs, TLS 1.3 |
| ECDSA P-384 | 384 bits | Top-Tier Security (Equivalent to RSA-7680) | Enterprise government compliance, financial infrastructure |
Frequently Asked Questions (FAQ)
Are generated private keys sent to DwellixTools servers?
No. Key generation is executed 100% locally inside your web browser using the native Web Crypto API (window.crypto.subtle.generateKey). Your private key is generated inside your device memory and is never transmitted over any network connection.
Which key type should I choose for SSH server authentication?
For modern SSH servers, ECDSA P-256 offers superior speed and smaller key sizes while maintaining cryptographic strength equivalent to RSA-3072. For compatibility with older legacy servers, RSA 2048-bit or 4096-bit is recommended.
How do I use the generated SSH public key?
Copy the generated OpenSSH public key string and append it to the ~/.ssh/authorized_keys file on your remote Linux server. Keep your private key secret and secure on your local client machine.