That's not a password-manager, but a generator with it's own flaws. You must remember what type of password a service is using. If a password is leaked, you mus

That's not a password-manager, but a generator with it's own flaws. You must remember what type of password a service is using. If a password is leaked, you must remember the new master password. And it seems to not support crappy services with lenght&char-limit on passwords? So your actual password-manager is the place where you store these informations, probably your brain? Is there a browser-extension for your tool available? It seems more secure and convenient to integrate this generator directly into the browser. Just enter the masterpassword into the password-field, and let the password be generated in-place. Would remove some attack-vectors and speed up usage. Also, maybe then add some second master password as a general seed, to add personalization for every extension-user?