Once you’ve registered a Tumblr account, your password account will remain the same, unless you change it manually.
If you want to modify your Tumblr password using a desktop computer, follow along below.
1 Log in
using the green button below and entering your current email address and password.Open Tumblr login page >
is the option you will find when you click on the pencil in the right top corner.
3 Click on the pencil
to the right of password to open the screen to modify it.
4 Save your new password
after entering your old (=current) password once and the new one twice. Click on the Save button like we do in the picture.
Once you’ve clicked now, your password will be modified immediately.