Tumblr does not provide a native option that enables you to allow comments on your blog, but the social network does enable the installation of Disqus on many of its featured themes. Disqus is a blog comment hosting service which streamlines commenting on many different blog types.

Step 1

Go to the Disqus signup page (see Resources) and register for a free account. Log in to Disqus if you already have an account.

Step 2

Enter the URL of your blog into the Site URL box. Enter the site name you want to use in the Site Name box, which generates a shorter site "shortname." Add any other information requested, such as your email address. Click "Continue."

Step 3

Select "Tumblr" in the Choose Your Platform list. Select the shortname provided and press "Ctrl-C" to copy it.

Step 4

Navigate to the main page of your Tumblr blog and click "Customize" on the menu bar.

Step 5

Scroll down to Disqus Shortname in the navigation pane. Click inside the box and press "Ctrl-V" to paste the shortname you copied. Click the "Save" button to enable Disqus comments on your Tumblr blog.