You can use one password, hashed uniquely for each site: https://www.pwdhash.com/ https://www.pwdhash.com/ . But if example.com is hacked and your cleartext pa

You can use one password, hashed uniquely for each site: https://www.pwdhash.com/ https://www.pwdhash.com/ . But if example.com is hacked and your cleartext password is retrieved, it's not impossible to reverse the hash (for example.com). Or just write them down?