How to hide Blogger/Blogspot Banner.

1) Login to your account.

2) Go to Design > Edit HTML.

3) Go and look for:

<b:skin><![CDATA[

4) And paste this code at the bottom of that line.

#navbar-iframe {

display: none !important; }

5) It will look something like this:

<b:skin><![CDATA[

#navbar-iframe {

display: none !important; }

6) Then save your Template and you're done! :)