Help What is LesS/KEY & how it works click to open
LesS/KEY is a password manager that stores no passwords. It re-generates each one on demand from your single master password plus the name of the account. The same name and master always produce the same password, so there is nothing secret to leak, sync, or back up, and you only ever remember one phrase. By default each password is six short, memorable words. That is the correct horse battery staple idea from xkcd 936, built on the classic S/KEY one-time-password scheme (RFC 2289).
Nothing leaves your device. Everything happens locally. Your master password and the passwords it generates are never sent anywhere, never stored on a server, and never logged. There is no account, no sync, and no tracking. The app is a single page plus a WebAssembly module, with its fonts bundled in. Once it has loaded, it makes no network requests at all.
Quick password
Type an account name and your master phrase. The password appears instantly, masked; click it (or the master) to reveal. Press Copy, or Store to remember the name (never the password). Mark correct remembers this name and master, so that exact combination shows in colour; anything unmarked or mistyped stays black.
Console
The full command line. Type help for every command. Your list of
names lives only in this browser (localStorage), never on a server. Use
Export or Import to move it yourself (for example,
to and from a Notion page).
Naming rules
After a name you can add a length and a mode. R is six memorable words
(the default); C camel; H hex; B base64;
D digits (U… = upper). For example, github 20R.
End a name with ^folder to derive it from a parent; you still type only
your one master and the whole chain is computed.
Runs the real hel engine compiled to WebAssembly, the exact same generator as the command-line tool. No server, no account, no tracking, nothing to leak.
Quick password
The same name and master always make the same password, computed live in your browser. Your master is kept in memory for this tab only, never written to storage, and the app never talks to a server. Store saves just the entry name; Mark correct saves only a one-way hash, both on this device.
All commands
The full hel command line: ls, add,
enc, gen, comment,
correct, help, … Your catalog persists in this
browser (localStorage). Generated passwords are masked; click to reveal.