Documentation

• Custom themes

  Learn how to create a custom theme for your blog.

• API

  Invent new ways to use Tumblr.

• Share buttons

  Give millions of bloggers a way to promote your content.

• Tumblr in-app sharing

  Promote your app by letting your users post their stuff on Tumblr.

• Embeddable posts

  Specs and how-to.

Discussion

• Engineering blog

  Get firsthand updates from our front line.

• API forum

  Tell us how you plan to use our API, get help with it, and more.

• Theme developer forum

  Share feedback and get help from other developers.