If you want to change your Facebook password without logging into your account, you must do so through Facebook's Forgot Your Password feature. Open a Web browser and navigate to Facebook.com. Locate the spaces for your Facebook login credentials in the upper-right corner of the Facebook home page.Can You login to Facebook without password?
You can NOT log in to Facebook without a password, but you do not necessarily need to log in to Facebook. You can view pages and public content on Facebook WITHOUT logging in. For example, you want to see what Quora (the company) is posting on Facebook, you can simply go to http://www.facebook.com/Quora.