ECDSA Key Generator

What is ECDSA?

ECDSA (Elliptic Curve Digital Signature Algorithm) is a public-key cryptography standard used to create digital signatures. It is widely used in TLS certificates, code signing, and cryptocurrencies. Compared to RSA, ECDSA produces smaller keys and signatures while offering equivalent security — a P-256 key provides roughly the same security as a 3072-bit RSA key. P-256, P-384, and P-521 refer to the prime modulus size of the underlying NIST curves. Keys are exported in standard SPKI (public) and PKCS#8 (private) formats and PEM-encoded, making them compatible with OpenSSL, Node.js, and most TLS stacks. All computation happens inside your browser via the Web Crypto API; nothing is sent to any server.