ECDSA (Elliptic Curve Digital Signature Algorithm) is a digital signature algorithm based on elliptic curve cryptography. Compared to RSA, it offers smaller key sizes and faster signature verification. This tool supports multiple elliptic curves and output formats, suitable for applications like blockchain, JWT, TLS/SSL, and more.
This tool runs entirely in your browser, using JavaScript libraries elliptic.js to generate key pairs locally. No server communication is involved at any point, and your private key never leaves your device. The generated private key is stored only in the browser's memory and will be automatically cleared when the page is closed. Please be sure to download and securely store your private key file immediately after generation!