If you are using Mac OSX EL - Capitan , open safari and its preferences select Autofill and check the box of autofill whenever you login the passwords will be saved in the keychain .
And what's the reason you want to delete the keychain an explanation is needed , do you see any pop - ups on the screen prompting to enter password and that keychain pop - up never goes away or what ?
And please don't delete the keychain folder from user library into the trash , restart and empty the trash .
By deleting it you will notice , in the preferences folder of user library all plist will be mismanaged ( will not be an alphabetical order ) .