Split any secret into shares - reconstruct it from any k of them. Runs entirely in your browser.
Your secret is split into n shares using polynomial interpolation over GF(256). Any k shares reconstruct the original - fewer than k reveal absolutely nothing about the secret. Each share is a hex string. The first byte encodes the share index; the remaining bytes are the polynomial evaluation points. All computation happens locally - nothing is sent to any server.
SSS provides information-theoretic (perfect) security: k-1 shares reveal zero mathematical information about the secret. This is stronger than computational security - it holds even against attackers with unlimited computing power. Shares do not need to be encrypted to protect the secret, but encrypting shares with a recipient's public key binds each share to a specific person.
We believe in financial privacy and censorship-resistant tools. Monero (XMR) is our preferred donation method: fully private, fungible, no middlemen, no platform that can cut you off or harvest your data. Try not to use Patreon, Buy Me a Coffee, GoFundMe or similar services. Those platforms may surveil donors, do take a cut, and are only one policy change away from locking access. Monero is the only viable peer-to-peer electronic cash solution, that protects sender and beneficator but if you prefer Bitcoin or Lightning, Trocador converts it to XMR on arrival. Privacy first, second and always.