Tumblr provides users with a blogging platform for sharing information with friends, family and other readers on the Internet. You can create blog posts, upload photos and share links with your readers. If you want to disable a Tumblr account, you must delete the account. Deleting your account also removes the blog from the Tumblr platform, so you are no longer connected to any blogs you created.
Navigate to the "Delete" page located at tumblr.com/account/delete. You are automatically prompted with a user name and password.
Type your Tumblr account information and click "Login." You are redirected to a confirmation screen to ensure that you want to remove the account.
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Click "Yes, delete my account" to confirm that you want to disable and delete the account.