If I understand you correctly, that exists already and is called pwdhash: https://www.pwdhash.com/ https://www.pwdhash.com/. Available online and as browser pl

If I understand you correctly, that exists already and is called pwdhash: https://www.pwdhash.com/ https://www.pwdhash.com/. Available online and as browser plugin for the major browsers. The already mentioned supergenpass seems nice as well.